Multiple instances of omxplayer

[R-Typ]

Starting cast from Chrome extention or Android App works perfect. But if I select next video to cast and start it, the previous one remains running and I have 2 overlapped videos with 2 sound tracks. It seems that there are 2 instances of omxplayer running. I think this should be a configuration issue since nobody complained about such behaviour yet. Setup script run without any error message.