Hi.

My WH-1000XM3 headphones only have sound on the right earcup when the power is turned on.

I don't think it is a hardware issue with the left side, as when they are plugged in with the headphone jack both sides work for audio. However if I turn the headphones on for noise cancellation, sound is lost in the left ear again (whether using bluetooth or aux).

I have tried multiple factory resets and it doesn't solve the issue.

Any help would be appreciated - thanks!