I have an ICD (implantable defibrillator) in my chest. I am wondering if it affects the compass calibration? I have been flying my P2V for a couple of months or so now without issue. I fly at a nearby park some, but mostly in front of my house out of the cup-de-sac. Up until today it's been flying nice and tight. I've successfully kept my Vision calibrated, but this morning I noticed it is doing a "drift" when I hover stationary and yaw. If I give it a quick, short yaw (about 90 degrees) it will remain on it's vertical axis. However, when I yaw more slowly it is like I am pushing the right stick a little and drift off about 20 feet. I re-calibrated and tried again getting the same thing. I fly in NAZA mode, FYI and decided to go back to regular Phantom mode. Same thing. When I plugged it in to my assistant app, everything looks good. Not a big deal while it's up high, but when I am coming in to land and need to maneuver a bit, it is a little nerve racking with nearby trees, etc. Thoughts?