On my survival world, when quitting the game the app frequently (but not always) freezes. I end up with a black screen, the sounds in the continue in a loop, and I never reach the menu. I'm force to shut down the app (right click on task bar icon, "close window" works). More often than not, when I log back in, I find that some of my mine carts are missing (this part is another bug).
It seems pretty random. I've not been able to correlate the freeze with any in-game action.
I don't know if there is any log file or crash dump is available, windows event log doesn't seem to contain anything interesting (see below). If you let me know, I can attach relevant files.

Event log entries I've found:
Application- <Minecraft app package> was terminated because it took too long to suspend.
App- ActivateApplicationForContractByAppIdAsUserWithHost of the app <Minecraft app package> for the Windows.Launch contract failed with The remote procedure call failed..
App- Activation of the app <Minecraft app package> for the Windows.Launch contract failed with error: The remote procedure call failed..
App - Activation via contract helper of the app <Minecraft app package> for the Windows.Launch contract failed with The remote procedure call failed..

Last 3 do not seem to always show when a crash happens.