Heya,
I have a wishlist collection which I use for things-to-be-purchased. One item that was on the list, Heterotopias 001, used to be listed at this page, but has since been combined with the rest of the Heterotopias series, here. The obsolete item no longer shows up in my wishlist in the browser. Likewise, if I open the "My collections" tab in the itch app, I don't see the zine in my wishlist collection.
However, if I open the wishlist collection as its own tab in the app, I still see Heterotopias 001 listed there, with no way to remove it from the collection.
Very low-priority bug, but I wanted to bring it to your attention.