I saw another person have this same problem and they posted the solution to use the Shipping Manifest app.
The problem is the app is not very robust and you don’t have the option to add some shipping labels and not others. We have found a few times we print the shipping labels, check the inventory and then realize we cannot ship that item that day. There is no way to pick and choose.
The Shipping Manifest needs to be fixed in the Shopify menus.
I am using Microsoft Edge. Cleared cookies, browser, all the things.
Rebooted. It still does not work.
Here is the other person that had the issue → https://community.shopify.com/post/2736062