New scope got distorted image

Just got my new Midas tac 6-24 ffp from BFD.

Can't wait to use it but found out at max power the image is not flat from edge to edge. There is a clear distortion when moving the target from center reticle to the edge. I have used about a dozen scopes now and this has never happened till this scope. Is this normal for Midas tac? Other than that the image is clear and bright.
 
I have had something similar happen. Own a bunch of Aztec scopes. Got a new one about 18 months ago and it was not crystal clear at the top mag. I thought maybe I could deal with it but every time I looked through the scope it pissed me off. I called my retailer and they swapped out for a new one that was crystal clear. I asked them to double check before sending to me. So I'm saying, trade that thing in such that your satisfied. Maybe a manufacturing or shipping defect. Good luck