so, i get you have a lot of these, but i want to summarize them, as i haven't seen one of mine

1. All of my worlds (all main survival worlds anyways, i ran more than one) including templates were corrupted. I didn't have backups as i was going to backup them when the nether update went down.

2. My key binds are reset to default every time i start up Minecraft. Not much is changed from default but it is annoying non the less.

3. You now have to sign in through your account, (which is never disconnected) every time you start it up? why? Why can i not play my templates offline? why can i not use my custom skin offline? 

4. Multiplayer still doesn't work, even though it said in the bug fix menu/news it was fixed (Did you remove moblie-windows 10 cross play maybe?)

these are most likely common issues, but I am summarizing them because reading 3 different bug reports are most likely time consuming

(I would attach photos but i am on my parents PC Right now)

Edit: Extra problem added, and found out how to edit.