Same here. My enchanted diamond pick axe disappeared.
Mcpe iPad - same issue. Endermen attack without even looking at them first.
Can confirm issue in 15w49b (Windows)
Edit: Sorry, found the appropriate tracker for the bug I encountered
https://bugs.mojang.com/browse/MC-93655
Looks like it was fixed in 50a, Testing with 51b and it seems to be fine.
20w14a - So many Ghasts - getting shot at by 4-6 at any given time, kill one and another takes it place. No way to fight, just have to run. Also tons of skeletons, and endermen.