I updated to WP 8,1 Denim on my Lumia 928 just as soon as it was offered on the phone. Since loading Denim, every few days my screen becomes erratic, switching between apps and screens without any touch input. Only a soft boot will fix the problem until it starts again after another few days. This may (?) also be effecting my Bluetooth connectivity as I now have also been losing connection with my truck (Chevy) that also never happened prior to this upgrade. I have switched the touch sensitivity between Normal and High with no apparent change.
The previous version(s) of WP was very, very stable without a single crash in the year since I had the phone.
OS Version 8.10.14203.306
Firmware Revision 3051.50009.1446.0093
I have not used the Reset Phone button yet because I don't know just how big of a hassle it would be to start all over again with a blank slate.
Any assistance would be genuinely appreciated.