My advice would be to get a diagnostic check. Also could this be an issue with the dab antenna? Or is it happening when on phone calls or streaming music through your phone?
This link will help regarding info on the Bluetooth module. But needless to say it's under the carpet passenger side.
https://www.audiworld.com/forums/q5-sq5-mki-8r-discussion-129/bluetooth-module-location-2955059/page2/