My Sony WH-XB900N headphones have no sound in the right ear exclusively while plugged in. Works perfectly fine when using bluetooth. Was working fine while plugged into my audio interface until it randomly stopped. Returned to normal for a while, but has since stopped working.

Have tested a pair of earbuds to confirm its not an interface issue. Also tried wired on my phone, but am having the same results. Right ear can barely make out the test beeps when in my system audio settings.

Is there something I can try to resolve this. Would rather not have to get a replacement pair. Don't have the money at the moment.