Updated to 3.2.8, for Android <= 4.1 that could reboot when toggling apps.
I did not spend too much time on it, but did not find a way to activate closed apps, so it is scenario 1 above.
...and my TrueSmart hanged yesterday, screen off. Buttons gave haptic feedback but no action, no reboot after 15s.
I added an extra haptic feedback for longer press to see if this long-long-long press is detected at this point. I assume so, but no idea why the device did not reboot. Maybe need some other way than using the PowerManager. The firmware is crappy.