Can reproduce: to make it easier, use minimal settings when attempting to take the report
affects 21w06a
I have added the logfile (and censored the IP addresses as this is a public report)
It affects all mobs that convert while in a minecart, including z villagers.
Could not reproduce in 1.15.1 or later. Then again the save where I encountered the bug in the first place turned out to be corrupted, might as well have been a side effect of the corruption in the first place.
Attached the datapack; just made sure it works... In 1.14 and 1.15 it starts flawlessly.
This specific datapack does not have a tick.mcfunction, however, I confirmed them being sometimes broken with different datapacks. Also it does not only affect my datapacks but also randomly packs that have been found working in previous versions.
Datapack files do not load consistently; they sometimes don't get applied (for loot tables/recipes) or executed (tick.mcfunction). The problem being that there are no error messages, just a cryptic message that the Render Thread is loading datapacks for some reason.
affects 1.16 and 1.16.1 releases as well.
/locate never allowed finding dungeons
fixed if you optimize your world.
still works in 1.15.x and 1.16 snapshots if you cure the villager multiple times (single-cure wont work)
affects 20w09a, with even more decreased probability but now also affecting normal pistons
affects 20w08a, with again decreased probability for some reason
still happens in 20w07a
apparently 20w06a fixed it for pausing the game but not for quitting & reloading
that is actually intended afaik
that is actually exactly how it's supposed to work.
Incidentally, using resource packs like Vanilla Tweaks fix that (if they are edited to fit RP version 5). Also it seems like the affected chunks are random.
its outputting the maximum ticks per second the game could possibly get if the limit was removed, from what it looks like