Hey guys -
Sprint S6 Edge here:
Did the update (via Smart Switch, the OTA update would fail), but now I am getting 'ghost' phantom clicks with the dual app mode and back button issues. I tried a hard reset, cleared cache and still did it, even before my restore.
Now it feels laggy, and I am getting these ghost touches, and the back button stops working in chrome very frequently. Sucks, my old S4 was a tank hardware wise.
example of issue: