Hi,
Thanks for your answer! I tried it, but it is not solved yet. I did an uninstall of Facebook for WooCommerce and connected again, but still the same. Also, the time it was uninstalled, all the listings on Facebook stayed there. The out of stock ones, but also the in stock ones. Connecting again and product sync did not change anything.
Can I send you a copy of our system report in a direct message? It does not feel ok to put it on the forum here.