API Debugger extension not triggering sign-in rule

Hi all, I’m following this tutorial to add some custom claims to a JWT using a sign-in rule ( Auth Pipeline > Rules) and the API Debugger extension for testing.

The rule appears to run and populate the JWT with my custom claims when we sign-in from our external app but I can’t get it working with the API Debugger extension. The API Debugger extension displays the sign-in box and receives/displays the token correctly but there are no custom claims from the Rule inside the token.

Is this a known issue with the debugger extension? Or is there any way I can force the debugger to trigger the rule?

The debugger would be very useful to me especially with more complicated flows involving refresh tokens.