MOBs sometimes freeze with DAB enabled

[xenium1024]

My understanding is that DAB should reduce the frequency of certain MOB brain ticks as the distance from the player increases, but not stop them altogether. (If dab.max-tick-freq is set to the default of 20 for example they should tick at least once per second.) However, I have observed where certain MOBs will freeze indefinitely with DAB enabled, unless the player moves. I have observed this with raiders during raids (pillagers and ravagers), zombified piglins, and wither skeletons. It may happen with other MOB types as well, but I have not been able to confirm this.

I have been able to reproduce this problem with a clean installation of the most recent Pufferfish build (pufferfish-paperclip-1.21.1-R0.1-SNAPSHOT-mojmap.jar), using no plugins and default configuration values. These were the steps I took to set up this installation for testing. I made no config changes:

• Create a new directory.
• Copy the pufferfish jar to it.
• Run the jar to let it create its files.
• Edit the eula.txt to accept it.
• Run the jar again and stop it.
• Copy my world to it.
• Run the jar a final time.

In the world I am using for testing I have created a flat circular area approximately 150 blocks in diameter, centered at -403, 95, 171, with a bell, two villagers, and two beds in a fenced in area in the center. If I trigger a raid there by drinking an Ominous Bottle while standing on a platform above the villagers, quite often one or more of the raiders will freeze. When this has happened I have allowed the game to run for more than an hour, and the frozen raider(s) will not move at all during this time, unless I move first.

In the attached screenshot for example, the pillager captain is frozen, while the other pillagers are behaving normally.

If I disable DAB, and make no other configuration changes, the MOBs do not ever freeze.

I have posted about this in #community-support on your Discord, but it seems like an actual bug so I'm also creating this issue here.

World download: minecraft-dab-test-world.zip

Thanks, and please let me know if I can provide any other info that would be helpful!