Capacitive light buttons not working after 8.1 Developer Preview install

[Chicopower]

Same problem here.

My Nokia 1520 "Back" light button does not work anymore since this morning.
Tried:
- Restart (not working)
- Disable Battery Saver Brightness (not working)

Problem appear as daniellvasill screenshot but only affect the "back" button for me

 

[Chicopower]

After about 10 hours with this problem, my "Back" light button come back ON :evil:
I did nothing special.. just using my phone..

 

[Conan143]

and done.... do a hard reset...its working :smile:

After hard reset remove the accessories settings as it is now device hub...