Working on a project, and for whatever reason two big holes are disappearing when slicing. They appear on the STL, as well as in Chitubox before slicing, but moving the slider up and down reveals that the holes are getting treated as solids and filled in. Its only two of the 7 holes on the file that are doing this, and the rest print as intended.
V1.7 and V1.8 do this.
Any advice would be appreciated.