Random Damage/Mobs not in correct location

Since the 1.16.1 version update on bedrock there have been multi bugs one major one is the increase in lag on both single player and realms, I am not sure as to what is the cause of it but since the 1.16.1 update Mobs have not been working correctly. A few people on single world and realms have notice being hit by random damage with no mobs around, dying to a mob that was not even in view range, and attacking mobs that appear to be invincible and not taking damage... this included passive mobs like the Invincible Llama >.> Reloading Minecraft does help but for a limited amount of time like 30 minutes before it accrues again. Over all what ever is causing this issue is greatly taking from the enjoyment of playing the game.