HELP needed - BT Wireless headphones

[Mortuus Medicus]

I bought a bit cheap Wireless headphones, specially because they have integrated FM radio, which i really like. But when they are connected via BT or just listening to the FM radio, only the controller side driver works. But then i plug the headphones via cable, both drivers work as if nothing is wrong? I've been googling for the past few days, and i can't find out what could be wrong...
Any ideas?


Lots of Love
Mortuus