I have a 2018 iPad Pro 12.9” and when on the selling screen in my drafts the sort feature comes on without me activating it. Usually when I am flipping back and forth between apps and come back to the eBay app it will be up and covers about a 1/3 of the page on the right and when I try to close it by hitting cancel it doesn’t respond at all. I have to close the app and re-open it to get rid of it. I noticed if I intentionally open the sort feature that the size of it is smaller and doesn’t go from the top to the bottom of the page as the one that appears by itself.
This happens several times a day and is a bit of a nuisance.
