@Dawn Sunset
Seed is -2393563048458677434, although the fish didn't spawn upon generation. As for the f3 info, I've relogged multiple times over time, and the mobs have despawned. Still am unsure on the cause, but the coordinates to the screenshot are -250, -135.
Sorry I totally mistyped this bug. What I meant to say is that when you create a buffet world, choosing one of the nether biomes, there is a ton of stone and water.
Sorry, I'm not sure what you mean? If you create a superflat world using one of the nether biomes you should see the water and stone.
new world > superflat > customize > crimson forest
create world
@pine1needle
This does seem similar since the game doesn't recognize the entities. Something I did find interesting however, was that I was actually able to pick up the fish in a bucket and place them down. I'm not very familiar to which entity mechanics correspond to certain parts in the code, so if I do come across this again, I'll have to test this out.