I was playing my Minecraft world last night (The 10th of October, 2020) and when I went to sleep in game, my screen went white and the whole program crashed. I haven't been able to get into that world since. It loads it and says get out of bed and something else, then it brings me back to the title screen.
Thank you for your report!
We're actually already tracking this issue at MCPE-79465, so I will resolve and link this ticket as a duplicate.
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