This still happens to me on very latest stable update, more so than ever before, the majority of times I switch profiles. Interestingly, it now does it on BOTH the owner and secondary profiles, and as I use multiple profiles multiple times a day, it means multiple reboots a day which is quite frustrating. Gestures don't work and unlocking takes ages. If I somehow manage to escape an app, it closes then flashes back into the foreground. On P7P 14 (UP1A.231005.007).