Base area is a cold village. Every time a Wandering Trader spawns in, it cause a huge lag spike. Unable to move or moving becomes jagged briefly. This might be a separate issue from the lag that has been plaguing all of us. This behavior seems to happen where ever we are, not just at our base. The host is on Xbox while the other uses Android. Both players experience the lag spike.
This happens on a single player survival world as well. Both worlds, no cheats enabled.
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Do you also experience the lag spikes or freezes described in MCPE-175116?

I apologize for the late response! Yes, I do experience spikes when interacting with inventory. Whether it be the player's or containers. Notably chests but all seem to be affected. I then noticed that anytime pillagers or wandering traders spawn in, they freeze the game for a few seconds. Also, redstone is really slow so I'm assuming tick lag is what's happening but idk. I've found that *prebuilt and player made structures create lag spikes even in single player worlds. Nether portals don't seem to change the lag, on or off. We have removed lots of the wolves, horses and other animal mobs from the area and the lag is still there. There seems to be more lag from camels, relative to other animals. Stuff like that but we can never pinpoint exactly what's happening. If I find anything else I'll add it to this comment to try and help.

If it is possible, can you attach the world affected to the issue?
Here is how you can access your worlds on Android and move them onto PC.
If the file is too big, you can upload it to a shareable site (for example OneDrive) and link it here.
Also, what device are you using exactly, what model and OS version?
This ticket will reopen automatically when you reply.

If it is possible, can you attach the world affected to the issue?
Here is how you can access your worlds on Android and move them onto PC.
If the file is too big, you can upload it to a shareable site (for example OneDrive) and link it here.
Also, what device are you using exactly, what model and OS version?
This ticket will reopen automatically when you reply.

I'll have to get back to you on that. The world is hosted on Xbox. I'm not sure if they are able to upload or send it. I will also look back at my older worlds to see if it's happening on them as well. If a video can also help I will definitely attempt to get a clip.
I have noticed that 1.20.60 fixed some/most lag but then 1.20.62 brought it back, badly. I really hope this info helps. I know it might be a group of things that are building up. These are some things that I have noticed. Including minecarts being super slow. It was seemingly fixed in . 60 as well but returned when updating to . 62.
Chests loading out and back in as you turn causes extreme lag.
Xbox players in general seem to cause substantial lag. They experience lag too, constantly and especially when I, on an android, come into render towards them.
The trader and llamas spawning in causes freeze lag
Opening any inventory causes freeze lag.
Moving Shulker boxes that have any items in it, within an inventory space causes extreme slow but constant lag.
Note: I don't experience constant lag like they (xbox host) seem too. Just at these specific times/actions.
Edit: Forgot to add that I use an Onn.11 pro Tablet android 13. The host uses an Xbox One.
Is this still an issue as of 1.21.2? If so, can you attach an affected world to the report?
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Is this still an issue as of 1.21.2? If so, can you attach an affected world to the report?
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Do you also experience the lag spikes or freezes described in MCPE-175116?