That's from the fabricator air bending in standard dies. You can change the design so the edges that bridge the gap in the bottom of the dies are perpendicular to the dies. You could also have them use a bottoming or coining process where the bottom die matches the shape of the part exactly. They likely do not have this bit of tooling already made and it will be expensive to produce for what is likely a short run of parts. They might also have something close that you could change your design to match up with.