When we're trying to make views that are specific and useful for a particular group of users (in the example artists) we can't use our project, which is a big template created in chronological order of the tasks that need to be completed to, display subtasks when they are displayed as "expanded".

The only way to make them appear is to display subtasks as separate tasks, but that completely breaks our project view and makes it much less interesting for the project manager and the users.

In the images below you can see our set up with two of the tasks displaying all of their subtasks in the "expanded" display mode. Then you can see what happens when I apply a filter, they all disappear.

In the third image you can see the same view with the Subtasks displayed as separate tasks, but it's less useful as you no longer see the hierarchy of the tasks.