XR500 blocks Netflix, Hulu and Prime Video as a DoS Attack

First, a bit of a complex setup description.

• CM700 (32x8) DOCSIS 3.0 Cable Modem connected to Comcast 250 connection
• XR500 Router - Latest firmware - 1 Xbox One X connected directly with Ethernet cable to this Router and an Xbox One S connected by Wifi.
• Nighthawk Mesh X6S Tri-Band WiFi Mesh Extender - 1 Xbox One X connected this way to the Router
• Nighthawk Pro Gaming 8-port Switch - 2 desktop PC's connected this way to the Router

I switched my router to the XR500 from the Nighthawk X8 - AC5300 Tri-Band Quad-Stream Wi-Fi Router (R8500) and quickly ran into issues. In trying to resolve the problems, I have factory reset the router and set it up again.

So the actual issue is that if the Xbox One S streams from Netflix, the two Xbox One X consoles (one connected by Ethernet and one by Nighthawk Mesh) can't access Netflix, Hulu or Prime Video (YouTube and games work fine). Instead, during loading all three apps error on login (Error95 on Hulu,  Netflix gets error tvq-st-103 and Prime Video gives an error number that escapes me right now). While doing testing of the apps, I looked in the router logs and saw that IP's belonging to those three companies were being flagged as DoS Attack while trying to connect on the consoles. 

When the Xbox One S connected to wifi stops streaming, the video apps work again. If either of the Xbox One X consoles is steaming then so can the other.

This issue only started when switching to the XR500 from the Nighthawk X8 - AC5300 Tri-Band Quad-Stream Wi-Fi Router (R8500) and switching back to the old router solves the problem putting the issue somewhere in the XR500. Does anyone have any thoughts/workarounds to stop video streaming services from being flagged as DoS Attacks?