Hamburger menu appears in landscape mode after renaming on Windows Phone
How to reproduce this bug:
1. Make sure your phone is in portrait mode.
2. Select a file or folder.
3. Choose "rename" from the menu.
4. Tap "ok" or "cancel" from the renaming screen. (Don't tap the back button.)
5. Enter landscape mode.
6. You will see the hamburger menu on the right side, similar to the attached screenshot.