Jonas_Bertheussen , via OnePlus 8 Pro , Dec 1, 2021 : I have just discovered that I get a loud beeping sound that starts at a low frequency and gradually goes up to a frequency that lasts for about 2 seconds, when I put the earplug into the left ear completely normal, without too much pressure. There is a very loud, unpleasant beeping sound that has never been there before. I have to remove the earplug since it simply hurts. Have also tried the different sizes of earplugs. What could it be? This applies when the ANC is on and when I use Ambient sound.