Hi AJ, it looks like Burr has that fixed for you above, thanks Burr!

It tends to be difficult on the filleter when surfaces are almost smooth to one another but just barely not smooth like with a shallow sharp corner like you've got there.

Any time you have edges that meet at a sharp corner it means the fillet surfaces will not directly touch each other, instead the fillets have to be cut with one another and a corner juncture patch put in. But that process is much more difficult in very shallow angle places, there is more like a region of overlap between the fillets instead of a crisp intersection and also the corner patch tends to be a little tiny slivery thing.

It's best for areas like that to be either fully smooth or more distinctly sharp instead of something like 5 or 10 degree angle between the meeting pieces.

- Michael