@lu-k I have this same issue. It happens from time to time and breaks everything with sound. I can't use spotify, windows media player, youtube nothing. And if I click to the audio icon on bottom right corner it does not pop up. It fixes itself after a couple of minutes after icon shows a red cross sign, I right click it and run a solve audio problems and it says one or more audio services isn't running then it fixes it. Usually a restart fixes it too. But still this is an extremely annoying bug and I'm 100% sure it's caused by Opera GX since it only occurs when I'm watching a video and rewind it 5 seconds with left arrow key. This issue only triggers itself inside Opera GX and affects everything on my pc.