@Bobpliskin
I have run into it on various channels. If it occurs in LiveTV with guide, sometimes just pressing up or down (switching channels) will resync it, saving the restart. Other times, it just won't sync or even lose again after a few more minutes. I generally just head over to another channel/app to watch the content if available.
If the content is not available on another channel/app, I will usually just switch to watching something else.
You can try restarting your router when this occurs as well. I think some of it may just be a latency issue with the server providing the content. Wish I had better advice than just restarting all your equipment when this occurs, but do understand your frustration. Kind of hard to follow sometimes when the mouths or action don't match the audio.
Roku Community Streaming Expert
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