Wish I could help, but my experience with Bluetooth on my system has not been very good. I am not using the Network adapter, but just trying to run a mouse or keyboard. It seems the Bluetooth will forget about a device if it is not used within a certain time period and after that, information transfer will be spotty.
Some folks say they use Bluetooth for audio and it works OK, but that is a streaming type of operation. Wi-Fi devices might have an effect on Bluetooth transmissions. The distance, of course, is much more critical than Wi-Fi.
All I can suggest is to have the latest drivers and look closely at your setup as to distances, and location of transmitters/receivers.