sentry-dotnet: Xamarin Android: Unhandled exceptions never received in Sentry console

I’m not sure how to configure the new unified Sentry Sdk in order for it to capture unhandled exceptions. I’ve spent a day attempting to get it to send out unhandled exceptions, but they don’t seem to work properly in a Xamarin Android app.

The initialization of Sentry is performed like this:

SentryClient = SentrySdk.Init(o => {
    o.Dsn = new Dsn(AppConfig.SentryDSN);
    o.Debug = true;
});

As per comments in #96 I added:

AppDomain.CurrentDomain.ProcessExit += (object sender, EventArgs e) => {
    SentryClient.Dispose();
};

Then, elsewhere in the Android code (an Activity for example), given the following lines, I get two different results:

SentrySdk.CaptureException(new Exception("Manually thrown exception")); // this makes it to Sentry.
throw new Exception("Unhandled exception"); // adding this line causes neither exception to make it to Sentry.

In the application console, I can see information regarding the event:

Info: Capturing event.
Debug: Running processor on exception: Unhandled exception
Debug: Creating SentryStackTrace. isCurrentStackTrace: False.
Debug: Running main event processor on: Event <event-id>
Debug: Event queued up.
Info: Disposing the Hub.
Debug: Disposing SentryClient.
Debug: Disposing BackgroundWorker.
Debug: Event <event-id> in-flight to Sentry. #0 in queue.
Debug: Disposing scope.
Debug: Disposing SentryClient.

Randomly (at some point after playing around with various configurations), the Sentry console has received an event with <unlabeled event> as its title, and “Discarded invalid value for parameter ‘exception’” in the processing errors, but we are unable to determine if this is unhandled or not?

Additionally, if I use o.DisableAppDomainUnhandledExceptionCapture() and set up my own exception handler on AppDomain these aren’t sent either!

Is there anything obvious that I am doing wrong? Based on the documentation I don’t think there’s much more I should be doing.