Active project in the Project tree sometimes not with bold font

The active project is shown in bold text in the Project view tree.
If I switch from the Project tree view to FileSystem view and back, the active project is suddenly not bold anymore and I do not know which one is the active project.

See sceenshot.

Aportales theory: Apparently, the Project view tree gets re-populated when switching views. And the bold flag is not set in that case.