UR22MKII Randon Input Signal

I just bought the UR22MKII with the microphone and the headphones. The USB interface is installed with no problems, using Cubase Pro 10.5. I dont even have anything plugged into the inputs and when i start a new empty project (or anything else at any time) i can see the left channel on the input meter randomly jumping up every like 30 seconds. Anybody seen this before? I have no input devices at all plugged into my computer or the interface yet, just the headphones plugged into the interface. The input knobs on the interface are also turned all the way down. I have attached a picture of the meter, and thats about as high as it goes at random times. Oh, it also has the latest driver 2.04 or whatever came out last month, and the latest firmware update. Thanks!