I think I’d still expect a consistent result. Either all components should be offered for installation in “popular” even though they were installed before, or none of them should be. Right now, some are, while others are not, and it seems it’s also random which ones are and which are not.
@Jagster If you first scroll to the bottom of your list of components, then scroll up again and click the install button, is the sidebar theme toggle component detected correctly in that case?