I installed Page Title and created 2 view displays of type "Page (with Page Title)", these displays belongs to a single view.

Now, I decided to uninstall Page Title, but after that, when I try to access one of those view displays as a page, I get a 404 error, and when I try to see it with view editor, almost all options for editing the view disappears, there is only one button (Preview), and when I click it, it says the view display ID does not exists.

A workaround I found is to change some things in the database at the views_display table all values from "page_with_title" to "page" at the "display_plugin" column, this fixed this problem, but I would expect uninstalling module should do this work automatically.