Advanced security on Xfinity home routers is blocking Firebase Storage service

I recently talked with Comcast tech support and raised this ticket:  CR893371043

The first posting I found on this was dated Feb 16 and quite a few people have jumped on this Firebase thread since then:  https://github.com/firebase/firebase-ios-sdk/issues/4913

Firebase Storage is a service provided by Google and used by millions of end users accross the world. I found that disabling Advanced Security on my router fixed the problem immediately, then turning Advanced Security back on and the problem came back immediately. Google is aware of the problem (see the github thread) yet is has been 16 days now and not resolved.