This happens in tablet and non tablet mode.

1. Open some metro app in fullscreen mode having tablet in horizontal mode
2. turn tablet around by 90
3. open for example Edge, now Edge is bugged and edges have 5px border

In tablet mode this results in more problems like apps using 50% of the screen and not 100%.

It looks something like this:

Click image for larger version. 

Name:	YuEDaZp.jpg 
Views:	2 
Size:	22.9 KB 
ID:	57599

Any way to fix this?