The problem may be upstream of your hearing aids and Target settings. You don’t mention what device or audio source you’re streaming from, but it’s possible the audio settings of your phone, your computer, or the streaming source are out of whack regarding Left-Right balance at the “source” of the signal. Worth investigating, especially since adjusting via Target hasn’t resolved the issue. Also possible the “Ambient” mix of the Bluetooth Streaming sub-program in the Phonak app is having an impact on streaming clarity too, depending on your fitting… but even though that can help with streaming clarity overall, it’s unlikely to affect the balance.