MAUI: SetBeforeSend fails to be called for certain messages

[cagriy]

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

Raising this issue as per support team's recommendation on case 141760

1. Clone: https://github.com/cagriy/SentryFilter/tree/main/SentryFilter
2. Add your DSN on MauiProgram.cs line 17
3. Put a breakpoint on MainPage.xaml.cs, line 23
4. Start debugging
5. When it stops at the breakpoint, wait 10 seconds
6. Resume execution
7. Confirm App Hanging message is received on the sentry console
8. Check if relevant DEBUG messages exist

Expected Result

In the case of an App Hanging event, although a message is successfully sent to the Sentry backend, SetBeforeSend does not get called.

Expected Result: SetBeforeSend should be called for all messages sent.

Note: SetBeforeSend gets called for most messages but not for App Hanging

Actual Result

SetBeforeSend does not get called

Product Area

Ingestion and Filtering

Link

No response

DSN

4506310016958464

Version

4.11

[getsantry]

Assigning to @getsentry/support for routing ⏲️

[jamescrosswell]

Hi @cagriy - thanks for the detailed report.

This looks like something that hasn't yet been implemented in the Cocoa integration:

sentry-dotnet/src/Sentry/Platforms/Cocoa/SentrySdk.cs

Lines 94 to 107 in c20d162

	// TODO: Finish SentryEventExtensions to enable these
	// if (options.Native.EnableBeforeSend && options.BeforeSend is { } beforeSend)
	// {
	// nativeOptions.BeforeSend = evt =>
	// {
	// var sentryEvent = evt.ToSentryEvent(nativeOptions);
	// var result = beforeSend(sentryEvent)?.ToCocoaSentryEvent(options, nativeOptions);
	//
	// // Note: Nullable result is allowed but delegate is generated incorrectly
	// // See https://github.com/xamarin/xamarin-macios/issues/15299#issuecomment-1201863294
	// return result!;
	// };
	// }