I have two Deco XE75 Pro units which I have been using without issue for a few months, but after switching my ISP, I am unable to stream Netflix, and am encountering long delays in loading Youtube videos.  All other streaming and internet access is working normally--Netflix and YouTube are the only problems I have encountered.

My old ISP is Xfinity (cable), and I haven't cancelled it yet, so I have tested moving my connection back and forth. If I switch my Deco back to my cable modem (old ISP), the problems go away and I can stream Netflix/Youtube with no issues.

My new ISP is Breezeline (fiber), and if I bypass Deco and connect using their provided router, I again have no problems and can stream Netflix/YouTube just fine.  But when I remove the ISP router and connect my Deco directly to the Fiber modem, my Netflix/YouTube problems return, so it definitely appears to be a problem with the Deco.

I have tried changing my DNS settings to 8.8.8.8/8.8.4.4 but the problem appears to remain.

My Deco is configured in Router mode, because there is no other device between Deco and the modem. I would like to avoid using Access Point mode as that would require me to hook up a separate router between the modem and Deco.  My second Deco is connected to the primary Deco via Ethernet backhaul. 

While I like the wireless mesh features, this is really disappointing and if I can't find a solution I will likely abandon the Deco altogether and go with another brand.