Ugh, the achievement has appeared days after. So I guess it is working.
I could not reproduce this issue in single player mode.
This issue is still happening in Windows 10 on the new version 0.16.0. On a realm just put some items in anvil, exit the app. When you come back into the world all the items have disappeared.
I am now able to consistently reproduce this problem. And it is NOT related to the problem mentioned above with feeding. I haven't tried on single player, but this happens on the realms by doing this :
1. Create zombie spawner or something that can keep the mobs coming
2. Have a sword in slot 1, and a (anything) in slot 2, such as a shovel
3. Then attack quickly (clicking at speed)
4. While attacking, use the keyboard to switch between slot 1 and 2
Very quickly one of the two items will duplicate over the other ones.
I will try this in single player as well
Same here, I had diamond pickaxe in version 0.15.10 with Efficiency V, and was able to destroy 2 blocks with one strike. But since version 0.16.0 that very same pickaxe is behaving like normal diamond pickaxe as if with no enchantment. And only destroys 1 block at a time.
Same here, on Windows 10
After reading through more bugs. I think this is also related to MCPE-17606, because I was playing on Realm with other people.
Seeing the same thing, Its almost impossible to fill the end portal due to never seeing any endermen. It's even harder due to not having villager trading.