After slicing a ring, the center of the ring is solid instead of allowing an object to go through it.  The first several and the last several layers look good but starting around layer 23 to 480 the center is filled in.  The file I've been using can be found at https://www.thingiverse.com/thing:4826707.

I'm using setting for a Creality LD-002H and I've tried both on Windows and Mac.  If I rotate the image on it's side then it's slices just fine but it's not the ideal way to print this item.

Thank you