My plexplayer on android never closes



I am using Plex with audio chrome cast.
Whenever I am done with playing songs and want to finish and close the plex app on my Samsung S7 the app seems to close but it remains active, in the top row status bar, the icon is still visible and it opens when I pull it down.
Tapping the X sign does not close it and I cannot swipe it away either Advanced task killer cannot close it and if I tap the play icon the normal screen of the minimized app opens.
The only way I can close the app is reset the phone or go to the installed apps section in the setup and kill it there.
This is pretty inconvenient any clue how to solve this?
Both my android and the plex app are up to date.


No One with a suggestion how to solve this?