Bluetooth_le_tracker detects everything but our phones

I have successfully set up bluetooth_le_tracker and have let it run for a while to populate the known_devices.yaml

My hue bulbs, hygrometers, the esphome devices and even my mouse have all been picked up (and cluttered my entities list) - but not the two of our android phones.

I have looked at the phones’ BT MAC address and it has been the same all the time, so it shouldn’t be a problem of randomized MACs. The UI even says "Your phone’s address is <MAC>", so I don’t think it’s faking the MAC only on announce messages, at least that wouldn’t make sense to me.

I even went and added the devices to known_devices.yaml manually, but unsurprisingly, they are never detected “home”.

I’m running an up-to-date Home Assistant OS on a NUC with multiple esp32 in ble_tracker / proxy mode if that is relevant. I have also tried to let it scan for the phones while being closest to the NUC itself (= in reach of the actual BT adapter)

Any idea why they are not being picked up?