WiFi often dissconects when using WiFi calling >;(

[Bradens PCs]

This was happening frequently during calls lasting over 1 minute when at home. I also was having other issues with my LG V10 overheating and getting really slow. So I got a warranty replacement and received a V20. This phone is much better....but now my calls are disconnecting again! Is this a common problem or could the issue be something with my router?

 

[Bradens PCs]

You know what, I use DHCP reservations for IP addresses of mobile devices on my network. For certain things to work correctly, and for me to always know where everything is at, I use reservations (or just static IPs for non-mobile connections) so that I always know what IP every device is on. I recently changed the IP that is assigned to my phone. Could this have affected WiFi calling? Is there a way to "reset" WiFi calling? Also, what are the ports that Android/AT&T WiFi calling uses? Maybe I can try and set up some port forwarding and see if that helps...