Close Holes creates two manifold faces (on previus correct STL)

[GiovanniSer]

I add the file, where I attempted to close at lest a part of holes.
The STL posted is the one as before the attempts.
It has holes but the manifold faces is correct.
So you can check the bug.
3Internal.zip
BR
G.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. The resources of the VCLab team are limited, and so we are asking for your help. If this is a bug and you can still reproduce this error on the last release of MeshLab, please reply with all of the information you have about it in order to keep the issue open. If this is a feature request, and you feel that it is still relevant and valuable, please tell us why. This issue will automatically be closed in the near future if no further activity occurs. Thank you for all your contributions.