After some debugging I managed to resolve my issue. I figured out that I was calling: reportOutgoingCall(with:connectedAt:) before I was calling reportOutgoingCall(with:startedConnectingAt:) because in our application, there is no ringing phase. Guaranteeing the correct order of the two calls has fixed my issue. Now we get the expected full-screen incoming call for all calls and we don't see the banner anymore.

We would like to continue with Universal Links, but we have an issue with auto-launching Universal Links from a browser. For example, when we tap on the Universal Link, the native app opens with no prompt, which is great. But when we try to open the link via Javascript either the link opens in a new tab, or if they have popups blocked then nothing happens. We have handicapped users and want to absolutely minimize their interactions. Can you think of any way we can auto-launch a Universal Link?