ServiceNow Application Scope blocks UI automation and never times out

I need to be able to handle the Microsoft Login and SN user authorization pages that appear when the ServiceNow Application Scope tries to connect to ServiceNow. (Using OAuth 2.0 with Client ID and Client Secret)

But when the SN App Scope causes the browser to open for authentication, it just sits there. It never gets to the next activity inside the scope, and never times out.

It even blocks the other branch of a Parallel!

How are we supposed to use SN Application Scope when it won’t let us authenticate?!