Just got my V2+ yesterday, noticed when spinning the props on that one of the motors has a very noticeable "stutter" to it that seems to be magnetically induced - the other 3 spin freely (and will continue to spin after flicking them) but this one motor will pretty much immediately stop after it's spun. The stutter appears in 12 evenly spaced steps. The copter also seems to tilt towards that motor when taking off, almost as if it's slightly binding... Anyone encountered this before? Thanks!