I've never submitted a bug before, sorry.
In my Minecraft pocket edition world, it kicked me out without saving, so it took me back to when it last auto saved, which was when I was sleeping. If I try to click 'leave bed', it kicks me out of Minecraft and does it over and over, and I am unable to play the world. I can't start a new one, as it's a survival world and I would lose all my progress, and my builds.
My Minecraft is also in 1.16.40, but i had to say it was 1.16.3