When I'm watching videos on youtube and I click the "up" button, the volume bar goes from white to yellow as usual, but it gets stuck there, it doesn't let me go up to the last 5 red squares. Many videos have very low sound and need volume at the maximum level. I have no idea how this happened, yesterday the phone was working just fine. This happens when I'm using earphones. The ringer and general volume of the apps is working just fine. It's only the "headphones" volume bar mode that has this problem. I already checked and the EU limit is turned off and I rebooted the phone. It didn't solve the problem. Does anyone know how to fix this?