You wouldn’t happen to have an app called “TopDon TopScan” or something like that, would you?
There are a few apps that have a nasty habit of aggressively “hooking” the BT pairing process, and that app is on the list. Have a look here, where a couple of the problem apps have been called out: Victron Connect Pairing Issue (Android 15) - #62 by RoarPowerNZ