Invisible products?

[Markus]

I am getting products imported from my business system to a category named "sharespine". 

In backend the category "sharespine" is empty and no products is visible at all.

But in the list of "product without description" the products are visible, and I can edit them from there.
When I edit the product, change category to a valid one, saves, it shows perfectly.

Have anybody any idea what this could be?
 

Using Prestashop 1.7.5.2 and www.sharespine.com as connection to my business system.

[tuk66]

One product has records in several database tables. I think that import didn't create all required records.