Regression: Included file is not parsed until header is opened

I can't reproduce with a minimal example, but in my project I have a file foo.cpp which includes foo.h which in turn includes defs.h which contains some enums and defines.

The symbols in defs.h are not highlighted and are not accessible in foo.cpp until I open foo.h, then they become highlighted.

All header files have include guards.

Problem appeared in 82e347095c4bdb7a6419d28798639e60591e3992