FLS slots are a limited resource in Windows. This blog post talks about the importance of the slots, and what we did to change the limit.
Bluetooth Low Energy MIDI (BLE MIDI) devices are all a little different. If you run into problems connecting to the device, or sending or receiving MIDI data, we'll need a diagnostic trace to be able to understand what happened. This blog post explains how to capture and report any BLE MIDI issue you find.