Those are definitely different links, which means different data is encoded inside the link. I’m guessing part of it is to tell glide which tab to navigate to, then which list item in that tab to open.
I think there is a lot to the inner workings of that link that we don’t know or realize. I suppose that since the tab is hidden, glide can’t complete the navigation into the list item of that tab and just defaults to the first tab. I also suppose that glide is building the link in a way that will take you to the correct tab that you shared the information from. Imagine if you had 5 tabs with the same list on each of them, and you shared an item from the third tab. Which tab would you expect the deep link to open?