True story, and that’s the life of a coder. Bug>debug>patch>repeat. I have seen a few reports posted improperly, which isn’t helpful either.
Not the only one. I haven’t found a fix that works yet, either. Looks like we just gotta wait and hope for a hotfix.
I am not very knowledgeable about mob mechanics, but I believe that the reason that the fish and squids are not moving is because mob's path-finding stops after you get about 32 blocks away, causing them to stop moving. Hope this explains it!