Dropping Phone Calls on Wifi Calling

I'm using an iPhone 11 Pro Max and the Orbi SXR30 with 2 satellites. All settings are still on default except for the guest channel is off.

Since I installed the Orbi system, I can not use Wifi calling reliably. It sometimes works for a couple of minutes and other times I can't even make a phone call at all. I thought maybe it was my internet provider but they have been to my home 3 times now and they say the connection is great on their end.

On the flip side, I have absolutely no problems streaming videos, playing online games, live streaming, etc. Literally every aspect of using internet is perfect, minus wifi calling. I have my personal phone, work phone, and my wife and 3 kids all have the same problem, great internet but no wifi calling.

I have no cell phone service at my home so wifi calling is pretty essential. Does anyone know what I can do to fix this issue? 

Firmware Version: 4.2.3.102- up to date