Flow & Vase mode

 From:  Phiro
10336.9 
Hi,

My theory is that your problem comes from your "Vase mode".

Your object is a full solid and plain vase.

Your software wants to do the same thing as a "Shell" operation.
Without the patterns, it's OK, I think. but with it, this mode could give you some problems.

My advice is to do a real vase with your revolution surface (unselect the cap ends checkbox), and do a Shell on it (or do a surface of revolution with a closed curve with inside and outside.
Next you add the patterns.

A theory to be verified...