I think here is a related issue (4 months old, no answers):
https://forums.roku.com/viewtopic.php?t=94113Video player fails to create after exit with a Home button (I'm experiencing the same issue, probably because my whole scene is added to m.global).
When I exit normally with a back-back-back-back - everything is ok.
So I guess video player remains in memory and Roku Firmware does not allow to create a second instance of it.
Also this issue with Roku Ads Framework could be related:
https://forums.roku.com/viewtopic.php?f ... 53#p537804