NextDNS interfering with FAST Streaming channels?

Greetings, everyone. 

I've recently purchased a new OTA DVR, from Tablo, that also incorporates several FAST streaming channels. I am supposed to be able to record these streaming channels but I am running into about a 70% failure rate in the recordings. 

The reason I'm posting here is because I also have NextDNS configured on my router and am wondering if, possibly, NextDNS could be causing interference with the streaming channels which results in the failed recordings. After reviewing the various logs on devices, I do not believe this is the case, but wanted to ask here to cover all the bases. 

The company is not acknowledging there is a problem and is trying to blame my ISP for "packet loss" which is not supported by the logs on the various devices. 

At any rate, does anyone think NextDNS could be causing this behavior from my DVR? I'll be happy to provide any additional information. 

Best regards, 
Michael