include_dirs does not work with multiple workspaces

[laktech]

1. Create a workspace
2. create a project with an include directory and a single hrl file
3. vscode does not complain about the -include() that references the hrl file
4. add another project to the workspace, similar to (2)
5. vscode complains that -include() is unable to find the hrl in the project created in step (4).

are workspaces not supported?