when I put an item that already has some durability loss into the enchanting table, the game crashes and I lose that item.
if I put an new item into the enchanting table I'm able to enchant as usual.
others on the realm seems OK - only I'm disconnected it seems.
I could not reproduce this on Samsung Galaxy S6 (SM-G920W8), Android 6.0.1 MCPE 0.15.90.7 (single player, not realms)