In experimental mode and Addons, entity updates are suspended

I turned on experimental gameplay and installed addons. But now I have a problem, I found that the mobs have random AI loss (and affect all mobs in the chunk where they are located)
I don't know how to make them lose AI, it's completely random, the same problem exists in BDS, I hope it can be fixed.
If this is a design flaw of the addon, I hope the game can give a hint instead of letting the AI lose.
The world in question is in  cloud drive download.
View the issue:
1. Download and import mcworld
2. Teleport to (overworld) 60005, 66, 15426 This is a problem chunk, maybe more
3. See the sand? Please watch the video

After breaking a problem block (I don't know what to call it), the chunk comes back to normal, I don't know why.