Severe lag when interacting with objects, chests, accessing inventory, and loading chunks

@JEDI_JOHN My issues also seem to be worse near my base, As if there is something there the game doesn't like. I made a copy of my world and popped into creative and destroyed all chests and hoppers. I also wiped out all the mobs I have farms for. No change. I have quite a few cherry trees and wondered if the falling leaves were an issue, which I thought you could turn off but was unable to find a setting. One thing I noticed was hopper minecarts in my bamboo and sugarcane farms stop for 2-3 seconds when over a hopper, I imagine as its checking for items to be dropped in. I also noticed mobs are essentially "frozen" and don't really move. I was having slightly less issues when I was away from my base working on a project, I was at least able to open a shulker box and and sleep in a bed without lagging for several seconds first. Very strange...

I would also like to add I was experiencing issues with an older bug MCPE-175116, which was resolved a little while before this latest update,  so I don't know if this issue is related or something different this time around. 

The lag is terrible! On mobile you can barely play. Im.in my hardcore world and it freezes and crashes. This is the bug they finally fixed a few months the ago. I couldn't play for months. It's terrible!

The lag is terrible! On mobile you can barely play. Im.in my hardcore world and it freezes and crashes. This is the bug they finally fixed a few months the ago. I couldn't play for months. It's terrible!

https://www.dropbox.com/scl/fo/0jsdf8zol8glj3isljuqj/ALTC2CS9FWG_nSqgY7_aIOQ?rlkey=7hku0g1h4rd27jtb1jzd65icm&st=fyhgzyzc&dl=0

Hoping this link worked for help with testing...

The 1.21.51 release just came out, and everything is roughly the same. Chunk loading might be a little better, but I still can't open chests, eat, open my inventory, etc... when my base is in within simulation distance. As I stated in a previous comment there used to be a tiny amount of lag around my base.

I could see the following as culprits if they have increased lag over previous versions:

-Chests: There are over 1500 double chests at my base, and a few hundred barrels.

-Items in chests: Many chests and barrels are packed full of full shulker boxes and most of the other chests are full of items.  

-Hoppers: Over 2000 hoppers.

-Beacons: Over 120 beacons (100 decorative, about 20 powered)

-Lighting: Many thousand torches, frog lights, sea lanterns, etc...

-Glass: Doubtful, but there are probably 10's of thousands of glass blocks. 

-Item Frames: Over 300.

-Anvils: Over 100 (Anvil wall in enchanting room).

I tested the following:

-/kill @e repeatedly around the base - no change

-Removed about a quarter of the chests, hoppers and items in the chests - helpful, but still not playable. 

-Downloading the world from Realms and running it locally on a very beefy rig with a 4090 - no change. 

-Removed a few hundred sponges and the water that was falling on them (dry biome, so the sponges stayed dry) - Small improvement, no where near playable.

The 1.21.51 release just came out, and everything is roughly the same. Chunk loading might be a little better, but I still can't open chests, eat, open my inventory, etc... when my base is in within simulation distance. As I stated in a previous comment there used to be a tiny amount of lag around my base.

I could see the following as culprits if they have increased lag over previous versions:

-Chests: There are over 1500 double chests at my base, and a few hundred barrels.

-Items in chests: Many chests and barrels are packed full of full shulker boxes and most of the other chests are full of items.  

-Hoppers: Over 2000 hoppers.

-Beacons: Over 120 beacons (100 decorative, about 20 powered)

-Lighting: Many thousand torches, frog lights, sea lanterns, etc...

-Glass: Doubtful, but there are probably 10's of thousands of glass blocks. 

-Item Frames: Over 300.

-Anvils: Over 100 (Anvil wall in enchanting room).

I tested the following:

-/kill @e repeatedly around the base - no change

-Removed about a quarter of the chests, hoppers and items in the chests - helpful, but still not playable. 

-Downloading the world from Realms and running it locally on a very beefy rig with a 4090 - no change. 

-Removed a few hundred sponges and the water that was falling on them (dry biome, so the sponges stayed dry) - Small improvement, no where near playable.

I just updated to 1.21.51 as well and the lag is still there. Loading into the world had me stuck in place for a while and it took a good minute or so for things to load in, which I took another screen shot. Chests are still not opening,  inventory opened once after a 10  second delay. Mobs move for roughly a second or two and then freeze (I am still able to move) for 5 - 10 seconds before repeating the cycle. I have less than 20 double chests and probably fewer hoppers in the immediate vicinity of my base where I loaded in, and one beacon I think I am in range of. 

Same thing happened to my world, it started with simple lag and now it's unplayable, taking over 10 minutes to load the world, you can't open chests, the world is completely frozen, I'm attaching evidence of my mistakes here to help resolve the issue quickly.

https://youtu.be/Lr_WSEJp7hk?si=HKB5e4_gI3dH8ng6

https://youtu.be/fpHpgmFxWgE?si=Ijhjz215XqEnp7dI

https://youtu.be/mBUaA4BHQ90?si=7_Ool4nZC3P5rfj7

https://youtu.be/Skme7mUjdEM?si=84g9dW3xvtL51g1R

https://youtu.be/ARBiKRWayjM?si=HPKJ6xqhzQqQHCKF

Same thing happened to my world, it started with simple lag and now it's unplayable, taking over 10 minutes to load the world, you can't open chests, the world is completely frozen, I'm attaching evidence of my mistakes here to help resolve the issue quickly.

https://youtu.be/Lr_WSEJp7hk?si=HKB5e4_gI3dH8ng6

https://youtu.be/fpHpgmFxWgE?si=Ijhjz215XqEnp7dI

https://youtu.be/mBUaA4BHQ90?si=7_Ool4nZC3P5rfj7

https://youtu.be/Skme7mUjdEM?si=84g9dW3xvtL51g1R

https://youtu.be/ARBiKRWayjM?si=HPKJ6xqhzQqQHCKF

Hi, I've got the same issue. I had just returned to base from trials, but I noticed it first with the sun. It would start to go down but then revert back to where it was. This was when I wasn't at base yet. At base, I can't eat, sleep, open chests. Then it went blank, I can't move or see anything but a few black figures. Now, It won't load at all and crashes.

Hi, I've got the same issue. I had just returned to base from trials, but I noticed it first with the sun. It would start to go down but then revert back to where it was. This was when I wasn't at base yet. At base, I can't eat, sleep, open chests. Then it went blank, I can't move or see anything but a few black figures. Now, It won't load at all and crashes.

mobile user here.
Problem already present well before 1.21.51 and I say that it is becoming frustrating, too much lag in the overworld and in the nether. Previously on realme 8 5G I could have 10 chunks without any problem but now not only do I have serious framerate drops but I am forced to go from 10 to 8 chunks but the situation does not improve.

Let's see if it will continue to stay for another 5-6 years 😞

mobile user here.
Problem already present well before 1.21.51 and I say that it is becoming frustrating, too much lag in the overworld and in the nether. Previously on realme 8 5G I could have 10 chunks without any problem but now not only do I have serious framerate drops but I am forced to go from 10 to 8 chunks but the situation does not improve.

Let's see if it will continue to stay for another 5-6 years 😞

Interacting with the world, containers, entities, are all delayed (even mob movement freezes at intervals) like in

. I think that is what this bug is describing here. If so, I too am experiencing this issue at my base.

Playing on mobile (specifically iOS and iPadOS). Bug only effected my base recently, during 1.21.51. Prior to this update (and for a short while after it), everything was running as expected.

When taking a backup of the world to run some tests, I turned on cheats, keep inventory, set to always day, and set up my control variables by turning off the following:

• turning of mob spawning,

• mob loot,

• mob griefing,

• entities drop loot,

• weather cycle,

• entities drop loot

I then began to run experiments. Firstly, I discovered that this bug only affects my world if my main base is loaded.

I then went to the center of my base, bumped up my simulation distance from 4 to 8 so I can load everything at once, and then ran the /kill command. After running /kill, everything ran as smoothly as it used to.

However, I was not done. In another backup with the same setup, I teleported all my entities into a 5×6 box. Instead of worsening the situation, it fixed it! Obviously I had a slight drop in frame-rate because of the 170 entities, but at least nothing was delayed anymore.

My conclusion: Something about entities is causing the bug. Killing them all is a fix. Teleporting them all into one location is also a fix. Both solutions are too broad to narrow down. Here's evidence of my findings:

Also about the following screenshot:

Maybe a hybrid of this bug and MCPE-180268? I've had this happen to me at my base. In fact, here's that moment 10 seconds after logging in:

It's also possible that MCPE-187200 could cause this bug to worsen, though that bug has been marked as fixed in 1.21.60.25 Preview so hopefully not.

A side note, a lot of people are relating the issue to chests. My base doesn't have chests and I still suffer from this bug- I've switched to barrels long ago. And yet, removing the barrels does not improve this bug either. I'm also still uncertain about the cause for this bug since people are reporting that /kill doesn't fix it for them.

Since this bug renders some players' worlds unplayable, this bug should be a priority. Glad it was reopened but being marked fixed in "Future Update" is concerning (unless it was marked by mistake).

I’ve noticed that it is insanely slow on multiplayer. Slow enough to the point where you can’t do anything because the other player will just appear frozen and motionless. And if they do move it takes several minutes to show any inputs. Multiplayer is not possible at this point on switch.

Can confirm I am having this issue as well. It occurs most often at my base, which is a minimally upgraded village with less than 50 villagers.

it does not, however, occur there exclusively. This was happening frequently as myself and the two other players were spread throughout the world in an undeveloped the ancient city and the nether. In these situations, it manifests mostly in jittery minecart rides, where the minecart stops frequently (presumably when loading chunks) and delayed or undone block breaks (a couple blocks will be broken, no debris will fall, no sound will occur, and moments later, the sounds will occur in rapid succession and the blocks will reappear and break instantly. In placing blocks, this often results in the blocks placed returning to inventory. Behavior is much like a momentary timeout/lagswitch. 

Some times that happens to me idk how often it happened to u.

Some times that happens to me idk how often it happened to u.

This is happening to me right now I can't do anything in the world :/

This is happening to me right now I can't do anything in the world :/