color scheme crash

[ejaz8979]

I have upgraded my Lumia 1320 to windows 8.1. The color scheme of the theme crashes every now and then. But it is back to normal when I restart the phone. This happens mostly overnight. So I cannot track the behavior as to which app causes it. I dun want to factory rest my phone or go back to windows phone 8. Experts plz help. I have spent a heft amount buying this phone. It hurts me to see it not working perfectly.