Fios Video/Audio Drop out

[Fairmindedberea]

All of my stations are now experiencing "black screen" video and audio drop out at irregular intervals.  When I replay the show, there is no drop out.  When I watch Prime Video, I experience no drop out.

What is causing this and how can I fix it?  When it happens I see the following in the upper left hand corner of the black screen:

HDMA/DVI      No Time Information

[CRobGauth]

Does it happen on all TVs?

if not, have you tried swapping boxes around?

Have you tried rebooting box?

checked the tightness of all connections from ont to stb?