It’s not that it’s missing. I know that it’ll print it. But that section is “sparse infill,” which shouldn’t be on the exterior.
I’ve already tried rotating it in the slicer, and when I do so the problem goes away. However, I would like to print it in the original orientation because that is what was recommended by the designer.
I feel like no one’s addressing my original question which is: is there any way to manually change an exterior face to a wall?