This problem just began today, and so far seems to only apply to playback of episodes of Endeavour on PBS:
The playback seems fine for about 5 minutes (or so), at which point the message "your playback will start after these messages...." appears and the sponsor ad (Viking) begins to play, but after about 5 seconds, returns to the playback for about 5 seconds and the cycle begins again. We've tested on other episodes of Endeavour with the same result. However, the problem does not seem to apply to other non-Endeavour shows on PBS.
System reset has not fixed the problem. We have a basic ROKU setup, and did not experience this problem as recently as last night. Any suggestions would be appreciated.
