Hello,

Yesterday, my server has crashed, the watchdog of minecraft has terminated it because a tick lasts too long. In log, I saw that RandomPatches has suddently started to change the UUID of almost everything, foxes, pillagers, bees, and so on ... This map was created with the 1.16.5 and it should not have any duplicated entities.

What's the problem?

One of my player has died into the end and when he respawned in his base, all entities around his base was duplicated?
And the UUID changes has taken more than six minutes. (max-tick-time=360000)

Also experiencing this issue with infinite loop of UUID fixes on the server. I disabled it and it seems to be ok now, will continue to monitor.

Even disabled, I think it just disable the log entries. Removing the mod from the server fix the problem.

Looks like a duplicate of #208.

How can you be sure it was RandomPatches that caused this issue?

It's an infinite loop bug, the function "fix_duplicate_entity_uuids" has to be disabled in the config.

I too have a similar issue. Running a server on my home network, I sometimes get thousands of lines like this:
[randompatches/]: Changing UUID of duplicate entity theabyss:ralu_fish ..... (long UUID follows that)
but it will scroll those lines at high speed for a few minutes until the server crashes. This happens every few weeks. I'm trying to narrow it down to maybe a certain mod that is misbehaving so badly that randompatches just gets stuck trying to fix it's UUIDs.