I have 3 monitors with one of them (the right one) set in portrait (vertical) position

The application launcher is not positioned correctly, it's too high, look at the video to see exactly what's happening 

Video: https://www.youtube.com/watch?v=WpbPixYt19k



I found a temporary fix, just changing an option on the screen settings and applying. The fix doesn't last after a reboot/logout. 
Video of the fix: https://www.youtube.com/watch?v=auSDQTyYMQo (just for clarity) 


None of those problems were present when i had all my monitors in landscape. 

Reproducible: Always

Steps to Reproduce:
1. Rotate a monitor in the settings 
2. Restart the computer or log out

Actual Results:  
The application launcher menu is not vertically aligned with the panel at the bottom of the screen, the menu appears several hundred of pixels too high

Expected Results:  
The menu should appear just above the panel