Yesterday a strange thing happened: my GOS wasn't able to lock the screen. If it was timeout or if I pressed the power button (set up for lock instantly) the screen become dark, but after I pressed the button again, it was just got back to the screen before. No pass/PIN asked, no lock screen appeared. After some tweaking, changing back and forth the lock screen settings, I managed to lock the screen - but visually the lock screen appeared together at the same time as the "desktop". I tried to reboot and the shutdown, but my phone didn't reacted for these requests for quite a long time. A few minutes later it did though - with some lagging my phone was shut down. After a reboot looks like everything is back in normal - although I left with some questions and a twitching eyelid.
Maybe connected, maybe not: this story happened straight after I installed a few open source, supposed-to-be-fine Fossify apps from F-Droid.
Does anyone have a clue what could cause all of this? Is this should be just a bug, or might be a sign of something
worse?