I recently did 2 sectors in J on the A350 (LHR-HKG and BKK-HKG). On both flights I was not able to plug anything into either the power socket or the usb charging port without causing a lot of interference into my IFE headphones (loud buzzing from the socket or continual breaking up of the sound from the usb socket). Was I just unlucky to have this issue on both flights (in different seats) or is it a known bug of the seat design? I have a 14+ hour flight back to London later this week and it's going to be annoying not to be able to plug anything in while using the IFE system. Any suggestions on what I might be able to do to mitigate the problem would be appreciated.