We are having a particular issue over vpn accessing our web application where Chrome vLatest (92.0.4515.159) is not successfully upgrading to http/3, times out for ~5-6s, and then degrades to http/2. Chrome successfully performs the upgrade off of the vpn.
Microsoft Edge vLatest successfully performs the upgrade both on and off of the vpn.
Firefox vLatest fails the upgrade on vpn, and the web application ceases to work entirely. Firefox successfully upgrades the connection off of vpn, and the web application functions as expected.