Does anyone know how to fix the buffering and freezing since some channels went HD? CNN, MSNBC, Fox News, etc. Picture freeing audio continues. I'm on Firestick, Jarvis latest update, PVR stalker client. Thanks :)

The audio sync has been off for a couple of weeks now, or since went to HD, and constant buffering on some American Channels, CNN, MSNBC, Fox News, etc. Is there ANYTHING I can do to fix this, I have done all the fixes I know of, reset router, clear cache, packages, reset everything, turn off...