game grinds to an halt 1fps randomly when killing a zombie or drowned

i experience that the game grinds to an halt with 1 fps randomly after killing a zombie or drowned.(have not tried husk or zombie villager) and the corpse of the mob lies sideways half way thru the floor. and there is no way to quit/save the game and exit the game other than forcefully kill it. i can often play for a while but eventually it happens and it is annoying as all progress is lost and you have to start over again.

first noticed this when i built a drowned farm and it all the sudden was useless as it kills the game killing the mobs. but it also happens when caving/mining and you come across zombies.

it's like the game just ran out of memory, so i guess its a memory leak somewhere!?

this happens in both vanilla and modded(optifine/fabric)

world download if that helps: https://drive.google.com/file/d/1Az3_njyPUrBTBTBSwWRb0q4hK8iAaZLb/view?usp=sharing

(drowned farm at 450 194 145 if you guys want some easy pray to test on)

clip of what happens with alt-f3 screen: https://twitter.com/pesegolsson/status/1405954787317891084?s=20