Repro steps:
- Create a new blueprint.
- Select it, right-click, and Rename.
- As you start typing SelectionHighlight, you’ll notice that once you’re done typing Selection, you get a popup warning that “Filename ‘Selection’ is disallowed.” Then, when you try to continue by pressing H, it cancels out of renaming mode.
(I can, of course, give it the proper name by copying and pasting that text from an external editor.)