I dont know what is going on maybe some light refelction from the Track Clip and your Monitor?? On my Setup I have the IR camera behind me which causes some issues but your is front facings..
Besides the track IR be on the fritz I cant think of any other thing besides extra light reflections and the signal gets lost in the light ..
Under Advanced settings in the track IR software program look for Light Filter Threshold, try adjusting that and see if it helps..