OneSignal notification opens browser instead of Median app

Subject: OneSignal notification opens browser instead of Median app
Hi Median team,
I have a Chatify web app wrapped into an Android APK using Median.co. I configured OneSignal using the Capacitor integration option.
Push notifications are working correctly — my device is subscribed and OneSignal test notifications successfully arrive in the APK.
However, when I tap a notification, it opens Chatify in the external browser instead of opening/resuming the installed Chatify APK.
I need the notification click behavior changed to:
Push notification → tap → open/resume Chatify APK → open the relevant conversation
rather than:
Push notification → tap → open Chrome/browser
Could you please check the Median Android/OneSignal notification click handling and advise how to configure it so notification clicks stay inside the Median app/WebView?
Ideally, I also want to pass the conversation ID/message ID in the notification's custom data so that tapping a message notification can open the exact Chatify conversation.
OneSignal push delivery itself is already working. The issue is specifically the notification click/open behavior.
Thanks.