Hello,
Sorry for the late response. I decided to test something myself. I found the cats... One of the cats was outside my building behind the bed and the other one was in a block behind the bed (found it when i decided to mine the block). So they clippled through for some reason.
Sadly not. The cats sound animations are there but no cats even when rejoining.
Entering the block where a door is of any kind, fence,wooden or trapdoor and opening/closing it will freeze the player in that spot completley...you cant even look around or anything.... if you are lucky and you are looking at the door ATM you can destroy it to free yourself....the other solution is to load an older version like 1.14.1 and move away then reload in the latest version.