During a long play session, I saw the game screen go grey for a split second while switching to the mansion.  When I looked in the console I saw this error listed last:

error - hid3204169282 is not in it's worktask's workers

I don't actually know if the error was logged at the same time as the screen oddity, but I thought I'd mention it since I did have that outright crash yesterday, and this is the only hid error in the whole 10000 line log.  I also understand 'hid' generally to refer to 'Human Interface Device' which would be probably mouse or keyboard.  

Neither mouse or keyboard were doing anything odd at that point or have been giving me any problems in nearly two years in service.

Cheers.