Are you on the same settings as your coworker? If so it might be worth repairing the software and giving it a go.
If you're still having issues report it to your VAR and they can raise the potential bug to SOLIDWORKS.
Repairing the software appears to have worked. Older models still have the same issue it looks like but if I rebuild the assembly, everything works as expected. That suggests to me it may have been a setting that was different from my coworker that I was unaware of or specific to the parts I was using. That or perhaps there was something broken that was fixed by the repair.