UDP 443 traffic being block/timing out

Has anyone else noticed UDP port 443 traffic being dropped by the BGW/Gateway?

FAIL
  0/3 replies, timeout  cloudflare-quic.com (104.18.27.14:443/udp)

FAIL
  0/3 replies, timeout  www.google.com (142.251.151.119:443/udp)

FAIL
  0/3 replies, timeout  quic.nginx.org (3.125.64.247:443/udp)

This seemed to have started semi-recently and not sure if its firmware related or not. It's possible it could also be getting dropped further into AT&T's network but seems more likely its the gateway. I took this to AT&T's support but I don't think they even understood what the issue was. Not sure of the best way to escalate/fix this.