Offset 1.6mm thickness Mesh to STL, unexpected holes occur

Rhino Rhino for Mac
1

48%20PM
48%20PM1181×846 515 KB
30%20PM
30%20PM1171×853 544 KB
09%20PM
09%20PM1156×864 398 KB
46%20PM
46%20PM730×536 167 KB

In this 1.6mm thickness Mesh modeling, when I export to the STL file, small holes appeared.

How can I remove these holes?
Thanks in advance.

Regards,
Clara Kim

2

I solved this issue with the newest version CURA 4.3.0