Partly invisible squids.

Out of water - underwater part is invisible.

Underwater - part in the air is invisible.

No problems with fish.

Steps to Reproduce:

Local server (world opened for LAN). "Server" was running for 3,5 hours without leaving. During the time when this bug happened no one was in the world except me.

I went fishing in small river and squids were okay. In 1-2 minutes of fishing they become partly invisible (part which was under water). After five minutes in afk (without fishing or doing anything) they were as usual.

No textures or data packs were used.