Probably just bugrock being bugrock I've heard about invisible zombies and iron golems attacking villagers in minecraft bedrock so this is really not very new,(EDIT) also just imagine if bedrock edition would have hardcore that would be a serious pain with all the bugs in bedrock edition.
1.9, 1.15. 1.9 Because new pvp system that I don't know as a bedrock player, 1.15 because it had not a lot of items and its only addition was bees there so annoying if you just accidentally hit them.
