I have a dependency project which is configure in the parent project to always build

This project contains a build parameter which is configured to prompt the user to input/check a value

The project has no build triggers defined as it always started by the parent project.

Its configured to run on the same build agent as its parent

If I manually run the project it prompts for the build parameter.

However whenever it is triggered by the parent project the build runs to completion  with no prompt being displayed.

Open to suggestion on what I am doing wrong.. or is this a limitation of TeamCity version 7.1.2 ?