The Minecraft launcher and the game lowers the sound to 50% to my other applications

Since about a year ago the game and the launcher lowers the sound of my PC to 50%. Sometimes (few) this does not happen. I know it's a rare bug but I've tried a lot of things and it keeps happening. I would add that it only lowers the volume when the game is in the foreground. If the game is minimized, the volume returns to its original state after a short time.