It seems that it is a fairly common issue with Kodi on Android 6 devices.
I had heard of this fix but felt it worthy of a share.
In settings - video - acceleration - turn off AMCODEC
back up out of it and try again.
If problem persists do the same for the third codec.
Restart Kodi. Check your settings have stuck and try again.
Sent from my SM-N920V using DroidBOX Forums mobile app
Sent from my SM-N920V using DroidBOX Forums mobile app