Some imports do not show up in Qt Creator project tree

In the "Qbs files" node in Qt Creator, I only see QbsLibrary.qbs and QbsProduct.qbs under the imports directory, even though there is an additional QbsApp.qbs file in there.

Syntax highlighting for files using QbsApp is also broken - it's colored as if unavailable, and is non-navigable unlike the others. Other imports like AutotestRunner are also non-navigable.

The project obviously compiles file and everything is in the search path properly, it's just that the files are not shown in the IDE.

It's also completely unclear why the selection of which items work and which don't, seems to be random.