Found a random enough bug in 7.8 official. When I launch a game from a playlist, in this case TMNT from the Konami Classics playlist, it plays fine but when I exit sometimes I get stuck on the Games Details screen. The video does not play but I can move up and down the options on the left. My button to exit is unresponsive. I tried launching the game again but it hangs on the Launching Game popup. I can only exit via Task Manager and it states that Big Box is running, it does not say that it is Not Responding. Using VLC player.
The same game launches and exits fine from the Arcade platform.