I’ve never had a problem with BLE on Windows, but I’m using a TP-Link UB400 dongle on a 6 foot extension lead positioned behind the front wheel of the bike. My impression is that BLE issues are most common on systems that use a built-in antenna.
In any case the Connection Disconnected error relates to IP connectivity rather than Bluetooth, so my question is what kind of WiFi (protocol and equipment) is in use and whether there is some source of interference.