I wonder if using the import button I copied from the drop down menu onto the palette instead of the right side one is making that difference? NOW I’ll have to relearn doing macros again though…LOL! I’ve been away from zbrush for a few years, and I’m trying to get back up to snuff with it again and learn using it for 3d printing as well.
Just not enough hours in the day…
EDIT: Yep, that was it! Copying the import button from the top menu and using that instead caused the issue. importing the same object from the right palette did NOT cause the issue! Maybe you can document that for a bug report?