I've noticed this weird issue since the most recent update on PS4. An attacking mob will stop moving but an invisible version of the mob will keep attacking you. The stopped mobs attack animations will play even as it's just sitting still. It has happened so far with Endermen, Pillagers, Ravagers, and skeletons. If I happen to hit the invisible version by pure luck, the stopped mob will flash red. It has happened both in realms and on my Bedrock dedicated server and has happened 3 times today within about a 5 hour period. I have noticed exiting and reloading the game will usually make it run properly again, but this is just a band aid fix for likely a bigger issue.