Why can't I reference my Codebase anymore?

Every Cursor update seems to be randomly removing/enabling my ability to reference my codebase with @Codebase. It used to work fine, then I’ll update Cursor, and it will stop letting me do it. It just lets me use @Code. @Codebase doesn’t even pop up. My codebase is indexed and automatic indexing is on. All settings in Cursor are pretty much default.

Cursor seems to be getting literally worse every update. The first version I used like 5 months ago is literally 100x better than the version now.

How can I reference my codebase again?