[Shipper Pro] Shipper lists fraction of sites

When I try to use shipper, the sites dropdown only lists a fraction of the sites I have in my “hub.” I forget the exact numbers, but I have 50+ sites setup in the hub and shipper let me choose from less than 20.

I had posted this in another similar thread about a week ago but was asked to started a fresh one.

This is not specifically isolated to the site I have selected for the issue, I have replicated it with other sites as well.