We still haven't been able to reproduce this issue on our end. As others said, the files posted in this thread seem to be slicing just fine.
We would be happy to continue investigating, but we need to gather more information from the individuals that are having this problem. If you are experiencing this issue, please contact us directly at the link below so that we can start discussing and gathering more detailed information.
https://www.simplify3d.com/contact-us/