You don't need to test it again, that is just the way the Air2s and some other drones work. Their gimbals will not tilt up enough to include the zenith in a photo. If you can't shoot the zenith, you cannot do a real 360 degree spherical panorama...
The wide angle lens is MUCH heavier than a filter. The first time I attached mine the drone started throwing "gimbal overload" warnings every few seconds, then it settled down and hasn't done it since.
If you have the WA on it when you shut it...