[Bug]: iOS Service extension used only every second time

[Hunv]

What happened?

I implemented the iOS part regarding https://documentation.onesignal.com/docs/en/net-sdk-setup#ios-setup.
After that I tried to send test messages (push) via the OneSignal Page. I recognized, that the Badge of my app is only updated every second notification. I tested a bit and regonized that the NotificationServiceExtension is called only every second time.
It also makes no difference if I let OneSignal handle the badge or if I do it manually.

Steps to reproduce?

1. Setup a new Dotnet project
2. Implement OneSignal like described in https://documentation.onesignal.com/docs/en/net-sdk-setup#ios-setup
3. Build and run your app
4. Send 2 (or more) notifications. The badge will only update every second time.

What did you expect to happen?

Badge is updated on every new notification.
The NotificationServiceExtension is used on every new notification.

Relevant log output

Code of Conduct

• I agree to follow this project's Code of Conduct

[fadi-george]

Hello @Hunv ,

A few questions to help narrow this down:

Do you have App Groups configured in both the main app and the NSE with the same group ID? Both need to share the same com.apple.security.application-groups entry for the badge cache to stay in sync.

Are you using badge increment (Increase by) or setting an absolute badge value from the dashboard?

Can you attach the NSE logs? Running with OneSignal.Debug.LogLevel = VERBOSE and checking the device console (via Xcode or Console.app, filter by your NSE process name) would help confirm whether the extension is actually being invoked each time.

[fadi-george]

Hey, closing for now. Can reopen if more detail is provided.