Weird, I'm not sure what's happening there. Make sure you are not messing around with the game's variables or using a third party tool? Alternately check your sleepwear settings.
The chair thing should be fixed in the next release.
I don't use anything outside of this game or mod it. So I just don't get why it happens. It might make sense on the Android version since the game originally was PC only and Android games are sometimes troublesome, but I don't get why it sometimes happens on PC even if not as often.
As for the Chair, great to know and thank you.