I play minecraft dungeons with my kids and my character always loses progress after we quit and login again. It keeps jumping from level 23 to 17. Sometimes I'll have the same gear sometimes all my gear is gone. If I do have my gear it'll will show me as having a negative amount of enchantment souls. Once I delete all the old gear (I've deleted these multiple times and they keep coming back) the enchantment souls will add up back to zero.  Hope you have a fix for this as it's quite annoying. I'm playing via microsoft game pass as an fyi.