My nighttime profile has the screen timeout set at 15 seconds and the screen turning off apparently cancels the process of clearing apps.
It may be helpful to have the screen stay on through this process, no matter the typical timeout. 
My nighttime profile has the screen timeout set at 15 seconds and the screen turning off apparently cancels the process of clearing apps.
It may be helpful to have the screen stay on through this process, no matter the typical timeout.