The WP8.1 overview screen is reversed and the root cause is remote desktop connectivity issues

Computer Store News: Many Windows Phone 8.1 users today may complain that their Lumia phone has a strange bug, and the overview screen appears upside down. The root of the problem may not think of — it is a problem with WP8.1 remote desktop, which may affect the depth of the system, and is more than the expected access rights.

Bug occurs when the WP8.1 remote desktop is connected to the computer and the screen of the phone is displayed horizontally. The bottom button of the screen is on the left side of your phone.

The solution is:

Turn the landscape display mode to the right side of the phone, your overview screen will return to normal, and no soft restart is required.