Naming an entity randomly causes another named entity to despawn

Thanks for your report. Can you provide more information, such as how far apart were the pig and panda? Were you giving them the same name? Had you relogged between naming one and the other, or did you name them both in the same play session?

They were only about 30 blocks apart.  They were named in separate sessions (months apart) and had unique names.  Seems like it could be a hash table collision or something similar to me.

They were only about 30 blocks apart.  They were named in separate sessions (months apart) and had unique names.  Seems like it could be a hash table collision or something similar to me.

They were only about 30 blocks apart.  They were named in separate sessions (months apart) and had unique names.  Seems like it could be a hash table collision or something similar to me.

Thanks, this does seem like a promising lead to explore. Do you know how many named mobs you have in the area altogether?

Thanks, this does seem like a promising lead to explore. Do you know how many named mobs you have in the area altogether?

Thanks, this does seem like a promising lead to explore. Do you know how many named mobs you have in the area altogether?

We probably have around 50 or so named mobs in the area.  12 are villagers and the rest are assorted animals.

We probably have around 50 or so named mobs in the area.  12 are villagers and the rest are assorted animals.

We probably have around 50 or so named mobs in the area.  12 are villagers and the rest are assorted animals.

I tested this by naming 50 villagers with different combinations of saving and loading and moving some between chunks, and I could not reproduce. My hunch is that this is just another case of MCPE-21416 and the name-tagging is a red herring.

I am going to set this report to "Awaiting Response." Please comment if you can provide additional details or exact steps to reproduce, and the report will automatically reopen.

I tested this by naming 50 villagers with different combinations of saving and loading and moving some between chunks, and I could not reproduce. My hunch is that this is just another case of MCPE-21416 and the name-tagging is a red herring.

I am going to set this report to "Awaiting Response." Please comment if you can provide additional details or exact steps to reproduce, and the report will automatically reopen.

I tested this by naming 50 villagers with different combinations of saving and loading and moving some between chunks, and I could not reproduce. My hunch is that this is just another case of MCPE-21416 and the name-tagging is a red herring.

I am going to set this report to "Awaiting Response." Please comment if you can provide additional details or exact steps to reproduce, and the report will automatically reopen.

@GoldenHelmet This is an issue I experience regularly on my friend's realm. It's not exclusive to named mobs as my foxes, pigs, and mooshrooms as well as tamed horses and a Mending villager have vanished, but whatever bug is causing this, it seems to prefer named mobs over unnamed ones as unnamed turtles in my hatchery have never despawned but my named one have all despawned except one.

I'd send you the world save but we're both on Xbox and I'm not in a position to jump through hoops currently to get the save file. If there's a simpler option I'd give it try. Or I could give you access to the Realm to experiment on. We can always back the world up.

@GoldenHelmet This is an issue I experience regularly on my friend's realm. It's not exclusive to named mobs as my foxes, pigs, and mooshrooms as well as tamed horses and a Mending villager have vanished, but whatever bug is causing this, it seems to prefer named mobs over unnamed ones as unnamed turtles in my hatchery have never despawned but my named one have all despawned except one.

I'd send you the world save but we're both on Xbox and I'm not in a position to jump through hoops currently to get the save file. If there's a simpler option I'd give it try. Or I could give you access to the Realm to experiment on. We can always back the world up.

@GoldenHelmet This is an issue I experience regularly on my friend's realm. It's not exclusive to named mobs as my foxes, pigs, and mooshrooms as well as tamed horses and a Mending villager have vanished, but whatever bug is causing this, it seems to prefer named mobs over unnamed ones as unnamed turtles in my hatchery have never despawned but my named one have all despawned except one.

I'd send you the world save but we're both on Xbox and I'm not in a position to jump through hoops currently to get the save file. If there's a simpler option I'd give it try. Or I could give you access to the Realm to experiment on. We can always back the world up.

@Ryan Dussinger: Thanks for your reply. From what you've said, it does sound like MCPE-21416. Most likely the reason that you don't have problems with turtles is that they move very slowly. Mobs that move around more are more likely to cross chunk borders and get lost in the chunk saving and loading processes. If most of your name-tagged mobs are villagers, that would also explain why you see this more with name-tagged mobs.

I am going resolve this ticket as a Duplicate of MCPE-21416.

@Ryan Dussinger: Thanks for your reply. From what you've said, it does sound like MCPE-21416. Most likely the reason that you don't have problems with turtles is that they move very slowly. Mobs that move around more are more likely to cross chunk borders and get lost in the chunk saving and loading processes. If most of your name-tagged mobs are villagers, that would also explain why you see this more with name-tagged mobs.

I am going resolve this ticket as a Duplicate of MCPE-21416.

@Ryan Dussinger: Thanks for your reply. From what you've said, it does sound like MCPE-21416. Most likely the reason that you don't have problems with turtles is that they move very slowly. Mobs that move around more are more likely to cross chunk borders and get lost in the chunk saving and loading processes. If most of your name-tagged mobs are villagers, that would also explain why you see this more with name-tagged mobs.

I am going resolve this ticket as a Duplicate of MCPE-21416.

@GoldenHelmet No villagers in the entire realm are named. I guarantee that naming any mob with multiple named mobs in loaded chucks causes a mob to despawn. And I've lost 90% of my turtles, they are my most lost due to the bug. The only turtles that have never despawned are the ones unnamed.

@GoldenHelmet No villagers in the entire realm are named. I guarantee that naming any mob with multiple named mobs in loaded chucks causes a mob to despawn. And I've lost 90% of my turtles, they are my most lost due to the bug. The only turtles that have never despawned are the ones unnamed.

@GoldenHelmet No villagers in the entire realm are named. I guarantee that naming any mob with multiple named mobs in loaded chucks causes a mob to despawn. And I've lost 90% of my turtles, they are my most lost due to the bug. The only turtles that have never despawned are the ones unnamed.

@GoldenHelmet Took me about 20 minutes to get results on video. 

https://1drv.ms/v/s!AvUc4QTheCC2-TNUq6Kf0ZC4iejm?e=3W5PXo

These are all the mobs in my immediate area. I wrote them all down in a book. You may need to pause as I went pretty fast as Xbox has a max record of 10 minutes at 720p. I didn't notice I lost my first llama in my test run prior, hence there being only 3 named ones and no 4th unnamed one. He had a green carpet equipped. Note the number of Sheep and Cows as, despite my theory, were the ones to vanish. 7 Sheep and 3 Cows. Ignore my return home at the end as I couldn't edit that out.

After I saved and quit and relogged in a different chunk this was my discovery.

https://1drv.ms/v/s!AvUc4QTheCC2-TLO2fSlifovNkz2

This is when I noticed the loss of the llama, also books sometimes change the display of the first page of text, often turning 'Enters' into 'Spaces' is irritating. But that's a different complaint.

I personally think this bug and the parent bug are similar, if not related, but are different as well. Before starting this demonstration, there was no mob despawn in 2 weeks of continuous play all across the world. To add named mobs without despawning others, I would travel out to a remote area where no named or tamed mobs were within sim distance. I then tracked down the desiresd mob and trapped it. I saved, quit and waited for the Realm to deload everything as no other players would be on. Once I thought enough time had passed I relogged. Now all tamed and named mobs would be in deloaded chunks. I'd then name the mob in question and work on bringing it back home. No mobs ever despawned during the two weeks of using this method. Not until my trial demo and my demo I recorded where I just named mobs without my arduous workaround.

I think there's something here that is really weird and I want to make sure this is investigated as much as the other one. I tried to provide as much info as I could because I know in bug testing it helps root out the issue.

@GoldenHelmet Took me about 20 minutes to get results on video. 

https://1drv.ms/v/s!AvUc4QTheCC2-TNUq6Kf0ZC4iejm?e=3W5PXo

These are all the mobs in my immediate area. I wrote them all down in a book. You may need to pause as I went pretty fast as Xbox has a max record of 10 minutes at 720p. I didn't notice I lost my first llama in my test run prior, hence there being only 3 named ones and no 4th unnamed one. He had a green carpet equipped. Note the number of Sheep and Cows as, despite my theory, were the ones to vanish. 7 Sheep and 3 Cows. Ignore my return home at the end as I couldn't edit that out.

After I saved and quit and relogged in a different chunk this was my discovery.

https://1drv.ms/v/s!AvUc4QTheCC2-TLO2fSlifovNkz2

This is when I noticed the loss of the llama, also books sometimes change the display of the first page of text, often turning 'Enters' into 'Spaces' is irritating. But that's a different complaint.

I personally think this bug and the parent bug are similar, if not related, but are different as well. Before starting this demonstration, there was no mob despawn in 2 weeks of continuous play all across the world. To add named mobs without despawning others, I would travel out to a remote area where no named or tamed mobs were within sim distance. I then tracked down the desiresd mob and trapped it. I saved, quit and waited for the Realm to deload everything as no other players would be on. Once I thought enough time had passed I relogged. Now all tamed and named mobs would be in deloaded chunks. I'd then name the mob in question and work on bringing it back home. No mobs ever despawned during the two weeks of using this method. Not until my trial demo and my demo I recorded where I just named mobs without my arduous workaround.

I think there's something here that is really weird and I want to make sure this is investigated as much as the other one. I tried to provide as much info as I could because I know in bug testing it helps root out the issue.

@GoldenHelmet Took me about 20 minutes to get results on video. 

https://1drv.ms/v/s!AvUc4QTheCC2-TNUq6Kf0ZC4iejm?e=3W5PXo

These are all the mobs in my immediate area. I wrote them all down in a book. You may need to pause as I went pretty fast as Xbox has a max record of 10 minutes at 720p. I didn't notice I lost my first llama in my test run prior, hence there being only 3 named ones and no 4th unnamed one. He had a green carpet equipped. Note the number of Sheep and Cows as, despite my theory, were the ones to vanish. 7 Sheep and 3 Cows. Ignore my return home at the end as I couldn't edit that out.

After I saved and quit and relogged in a different chunk this was my discovery.

https://1drv.ms/v/s!AvUc4QTheCC2-TLO2fSlifovNkz2

This is when I noticed the loss of the llama, also books sometimes change the display of the first page of text, often turning 'Enters' into 'Spaces' is irritating. But that's a different complaint.

I personally think this bug and the parent bug are similar, if not related, but are different as well. Before starting this demonstration, there was no mob despawn in 2 weeks of continuous play all across the world. To add named mobs without despawning others, I would travel out to a remote area where no named or tamed mobs were within sim distance. I then tracked down the desiresd mob and trapped it. I saved, quit and waited for the Realm to deload everything as no other players would be on. Once I thought enough time had passed I relogged. Now all tamed and named mobs would be in deloaded chunks. I'd then name the mob in question and work on bringing it back home. No mobs ever despawned during the two weeks of using this method. Not until my trial demo and my demo I recorded where I just named mobs without my arduous workaround.

I think there's something here that is really weird and I want to make sure this is investigated as much as the other one. I tried to provide as much info as I could because I know in bug testing it helps root out the issue.

Reopening for investigation as a distinct issue based on comments by 2nd affected user.

@Ryan Dussinger: I am confused by your videos because I saw the same 4 sheep and 3 cows in each one. There're weren't 7 in the first video. Perhaps those despawned in the same trial as the llama you mentioned.