Bug very much present in 1.21.9 RC-1 build. Its most notable with smaller entities like Bats, Mini Zombies, Phantoms etc. Issue has been around for more than few years now, feel that its gotten a lot worse in recent updates.
Tried 1.21.9 RC-1 build today, and sadly the issue is still there… 😥
I first noticed this issue 5 years ago around release of 1.16, also around time when Java 8 stopped being used. Really unfair bug for bow players, please fix it Mojang.
I find it when you disconnect they seem to just loose ownership completely. I tried this out by getting some new wolves and then logging off and back on. I also hit one to see and it did attack me. The only way i can get them to stand is with water and then they wont be able to sit again.
When the menu comes up in the video and pause it, you are in a different place in the world, I think this is just a quirk of Discord streaming when your system is at 100% and unable to push frames to your viewers, it just fills in the gaps with the first frame of your stream. I think its a system performance issue rather than a MC bug. It seems like your CPU is struggling, a potential overheating issue or driver issue? Does Task Manager performance tab show anything near 100%?
Strange that it only occurs in full-screen, perhaps this puts the game in a turbo performance mode, therefore increasing temperatures? Or maybe your FPS is capped when you are in windowed mode and becomes less demanding on CPU/GPU? Or maybe a problematic overlay stops working in windowed mode?
Can you share more hardware information with us, are you on a desktop or laptop? What is your CPU and GPU? Are all drivers up to date? Are PC temperatures fine? What does your F3 debug menu look like in full-screen vs windowed mode?