The maximum range of Bluetooth beacons typically varies depending on the specific type and standards of the beacon in use. In general, most Bluetooth beacons can reliably transmit up to approximately 30 meters without any physical obstructions, with a typical operating range of around 2 to 5 meters, depending on the transmit power.

I guess if you're hiding in the cupboard it's a problem, and the searcher already knows your BT address.