Video with the central distortion of DA
I tried recording the issue directly from the displays, but you need to make some contraption where the smartphone is perfectly glued and stuck to the DA, and even with that, the effect is quite subtle. More subtle that in the video. The video above is a recreation with After Effects. I had to exaggerate a bit - and I'm writing here that as a disclaimer - the effect is exaggerated, otherwise it might have been hard to notice what I'm talking about.
But the point is when it comes to lenses people complain about side, margin warping, while in my case I dont care about those, since those are hard to notice anyway. But central warping or pupil swimming is more noticeable.
My Beyond2 was very stable, had none of this. I'm not sure if such an issue is normal for DA or my unit has an issue. Both eyes, both lenses have the same warping. Also dial it down to 25% in your mind to better reflect the real warping.