From 1:38 to 2:15 you do a 360° and it changed from normal to really tilted at 2:05 until you were almost finished the turn at 2:15, then it comes quickly good at 2:20 when you bring the camera a little down.
If it would be the wind, first the gimbal is supposed to compensate for that and it would have been tilted on one side and after 180° it should be tilted the other side.
It is also possible that you have some angle in normal situation and then when you do a 360° only a normal to right tilt is visible instead of a left to right tilt.
Maybe you can check if the camera-gimbal block is free of movement, there could be dirt or small piece of wood stuck there.
Also I cannot really say that this don't happen to mine, would have to check at a place where there is horizon almost all around, but here there are mountains all around.