I used the link to put my complaint in too. But I've switched to Apple TV. Roku isn't interested in keeping my business.
Just for yuks and giggles, I tried the FoxNews app again this morning starting around 6AM EST.
Now 1PM and app has not buffered.
Will continue to watch until EOB and report back.
Turned tv off at 4:30 this afternoon. No buffering issues all day.