Input/mixer issue in UR22

My steinberg ur22 has worked great until a week back, but now whenever I turn the input and DAW mixer knob towards the input the sound cuts in one ear and the microphone doesnt become any louder.

It came after i had not used it for a couple of weeks, so maybe its a windows update problem but im not sure.

Any help would be greatly appreciated, as its really interrupting my work.