I'm getting a strange shifting of layers at the points where my model splits from being a single cross-section, to being multiple unconnected cross-sections. As you can see, the change appears at the same layer the hole begins, then disappears at the layer that corresponds to the top of the hole, then reappears at the layer where the part splits into 2 "wings".


Maybe it could be something to do with the toolhead moving in the opposite direction for these areas? If so, I don't know what setting would fix that.