Normal world/no one signed into Xbox/did not switch devices.
LAN world. IOS.
Started playing, one of my children came into local world, I crashed. On restart, my child lost all items in inventory and XP along with being reset to spawn point. Tried on another iOS device with another child's player data. I crashed, on restart, different child lost all items in inventory and XP along with being reset to spawn point. So now, I have two children with no XP or inventory items. This occurred after the 1.5 update, aquatic update.
Even after 1.53. PE update, my kids old inventory is gone. None of them were logged into microsoft or nintendo when it glitches them out. So either way, after the update, there stuff is still gone.