Not working BLE devices due to altering MAC addresses

[Kugeleis]

Modern BLE devices alter their MAC address with each new pairing.Hence your script doesn't find the in OS1 paired device in OS2.
Just copy the setup in OS2 (Linux) to a folder with the MAC address as used in windows helps:
First

sudo cp -r /var/lib/bluetooth/<adapter>/<in-linux-paired-MAC> /var/lib/bluetooth/<adapter>/<in-windows-paired-MAC>

and then run your script works.