That's a very odd form of bork. Quite curious as to how that would come about. Can't see how it would be a display issue (only part of the screen is slanty) – I can only assume it's an application issue. As an aside, personally, I find the idea of screens in toilets a bit weird. Although not as weird as cameras would be.*
*And certainly not as weird as the thing they do in the US where a guy sort of hangs about and hands you paper towels while expecting you to pay for the privilege. Personally I'd pay money for him not to be there.