Woocommerce – Variable Products Deleting

Hi,

I have a problem with the variable products – Each product I upload has about 5-20 variable ones, and for some reason, when I add, for example, 10 variable products and click “update”, about 5 of those delete.. then when I put in the info. again for the 5 that deleted and click update, sometimes those same 5 delete again, and sometimes they do not.. Did anyone else have this issue?? Is there a fix for this?

Thanks.