Hello,
I have the same problem. Except in my case it is actually the API returning duplicates. The id and the sku are identical.
In the back end of the websop, the product is showing only once. It looks like it has something to do with the pagination. As far as i can see, duplicates are never on the same page. In my case i have the last product on page 2 is repeated as the first product on page 3. The last product on page 3 is repeated as the 2de product on page 4.
The duplicated products in the API are identical except for the related_ids. They differ in order and items.
When i export an xml-file containing all the products it only contains one of the duplicates. It also contains the missing products from the API-calls.
I have tried different page-sizes, but that doesn’t seem to resolve the problem.
Thanks,
