[Bug] Blazor Server Incremental Consent Issue

[Shama-K]

Where is the issue?

• Web app
  • Sign-in users
  • [x ] Sign-in users and call web APIs
• Web API
  • Protected web APIs (validating tokens)
  • Protected web APIs (validating scopes)
  • Protected web APIs call downstream web APIs
• Token cache serialization
  • In-memory caches
  • Session caches
  • Distributed caches
• Other (please describe)

Repro

1. Select test project blazorserver-calls-api in Microsoft.Identity.Web.
2. Remove scope from this code in Startup.cs, by updating as below:
   services.AddMicrosoftIdentityWebAppAuthentication(Configuration)
   .EnableTokenAcquisitionToCallDownstreamApi()
   .AddInMemoryTokenCaches();
3. Run the application and Sign-in. Select ToDoList.

Expected behavior
Consent screen should be displayed.

Actual behavior
Requests goes into infinite loop.

Possible solution
Resolved with this Pull Request.

[jennyf19]

included in 1.5.0 release