How can we test in-app messages when a custom event occurs in Firebase ? my event show in DebugView firebase console but not show any message dialog in my application just show once when app start and when i trigger button test on device in Firebase console.

Have you tried to close then open the app?
Anyway, you chose to display "once per device for this campaign". Because the message already "show once when app start", it will not show again. To trigger in-app message again, you need to uninstall and install the app.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With