QML_ELEMENT code completion not working

QObjects registered with the help of QML_ELEMENT, and the like, show an error in the QML editor: "QML Module not found (QML_IMPORT_NAME)". It works in spite of that, but Code Completion doesn't.

(It works fine with normal registration of the types.)

Probably closely related to https://bugreports.qt.io/browse/QTCREATORBUG-24428