Hey MavicPilotCA,
I see you have been reprimanded by the "drone police" here on flight safety.  But I'm not gonna get into that.  That is your responsibility.
What I am looking at is the flight anomalies you experienced with your Mavic.  If you remove the time of day you were flying, where you were flying and the possibility of a jammer, I would say that you did experience a glitch or hiccup with the Mavic.
I can say this with confidence because what you described is the exact same situation I had experienced on a recent flight, in the day time, in a safe fly zone no where near an airport or sport event, out over a desert neighborhood in the SW, with very little wind.  I thought it was just me, maybe I did something during the flight or maybe a bird attacked the drone while basically in a hover mode around 250ft.
The view on the screen rocked/shaked, for a moment or two I thought I saw a dark object on the screen in the corner(why I thought it was a bird or really huge bug) and felt like I had lost total control of Mavic for a few seconds.  And then, I was back in control, camera was facing in direction of flight and I quickly returned it to home under my control.
After reviewing the captured video during the flight, I expected to see a glimpse of a bird but the dark shadow was actually the Mavic itself as the gimbal appeared to move in a fashion similar to when you first turn the Mavic on.
I have flown it a few times since that flight and have not experienced that scenario again...yet.
I am traveling right now but plan to publish the video of that moment along with the flight logs.  If you don't mind, I will post them here on your thread so you can compare with your incident.
I truly believe there was a hiccup/glitch that occurred during the flight and had nothing to do with a jammer or twitchy fingers.
	
		
	
	
		
		
			I was recently at a friend's house near a major sporting event.   It was a night event and there were probably 10-20k people at the event.    The house was about 1/2 mile away and I was  in the backyard showing the folks there the Mavic.   I launched it straight up and we could easily see the venue.   A few people asked me to fly closer.  Now I wasn't planning on flying right over the arena, but I didn't see much harm flying a few hundred yards to the side of the arena.  I was flying -- if I recall correctly -- about 250 feet in the air.    As I was about to cross the major street which separates the residential area with the grounds of the venue, I could see on the phone screen a major shake.   The camera view rotated about 30 degrees to the side.  Since the gimbal is fixed in a straight position this could only mean (I think) that the drone itself was somehow was interfered with.   I didn't see anything physical in the video, like a bird, so I do think that likely there was some type of RF jamming going on.   I was able to quickly get back safely, but even in the some of the return footage and while I was landing straight down into the backyard I could see the shaking.   I don't think there was any physical damage because I did do a 10 minute testflight when I returned home and I didn't notice anything unusual.