Error weak signal

I have the Tablo Dual Lite. I connected my antenna and Ethernet to the DVR and things worked well all day. Signal strength was 5 green dots and no issues. Not sure if it was a coincidence but I recorded my first show on a network channel and it recorded just fine. However when I went to watch other channels, I was suddenly getting an Error Weak Signal message. I all still able to get 1 network channel and a few other misc channels but the main network stations are not working anymore. I did several rescans, unplugged the device etc and no luck. My question is, if the channel scam shows 5 green dots for all the main network channels, why does it then show the weak signal error?

That is a static signal level, do the channel scan again