iBeacon Tracker does not detect anything

Hi,
I installed the integration Beacon Tracker but doesn’t show me any devices. Phones, headphones, watches, just nothing, neither Apple nor Samsung. :-/
I am using ODROID with Bluetooth ASUS USB-BT400
I have Bluetooth installed, iBeacon Tracker, in config.yaml Bluetooth:, restarted several times, turn BT on/off immediately at HA and also have the BT Low Energy integration installed which works reliably.
Any developer advice @bdraco ?

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i have the same problem. My rpi 4 with usb-bt400 doesn’t find any devices via the ibeacon integration. i have two mi flora connected so the bluetooth itself works.