A closed review request still had a fully-functioning Update menu,

which allowed new diffs and file attachments to be added without any

visible draft banner. While these would internally be part of a draft

and wouldn't be visible to any other users, it was confusing and

conflicted with the fact that all other editable components were

disabled.
The "X" buttons for deleting file attachments and screenshots was also

being shown, but was non-functional. It too has been removed.

Closed a review request. Saw that the Update and "X" buttons went away.
Re-opened and saw them reappear.