clangd grays out code after #endif that it shouldn't

Enabling clangd results in code appearing grayed out even after the `#endif`. This is how it appears without clangd:

 Enabling clangd results in:

Whatever is responsible for this seems to break "code graying" completely. For example, try these reproduction steps:

1. Open Creator.
2. Create a new project.
3. Select "Non-Qt Project" and "Plain C++ Application". I chose "qmake" as build system for simplicity.
4. In `main.cpp`, go to the first line and add:

#ifdef FOO
#endif

Now the code should look like this:

#ifdef FOO
#endif
#include <iostream>

Go to the first line again and insert a blank line. Creator gets bugged out by this. The wrong lines are being grayed out, and there's even an error message in there saying "Unterminated conditional directive."