Any way to keep an app active in background?

[usernameRika]

On my old OnePlus7, i would just "lock" the app, minimise it and then it would stay alive in background regardless of what i'd do in foreground (browsing, gaming).

On Rog 3, whatever i do, the app is closed randomly after 10 seconds or 3 minutes.
I've disabled every background restriction i could find. No success.
Is it even possible to do this on this phone?

[ASUS_Bot]

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