It is indeed standard behavior in the OS for that kind of child window to hide when the app isn't the in-focus or active app. We'll look into that behavior and the issues that would result from changing it.
While standard behavior for "child" windows, it is not required for all windows. Photoshop and many other applications for example can have multiple document windows open at once that don't disappear. You could easily make the track window a top level window in the application, at the cost of some additional management to get it to behave (mostly) as if it were a child in other ways.
While standard behavior for "child" windows, it is not required for all windows. Photoshop and many other applications for example can have multiple document windows open at once that don't disappear. You could easily make the track window a top level window in the application, at the cost of some additional management to get it to behave (mostly) as if it were a child in other ways. Another example is BBEdit, whose find and search results windows don't disappear when you switch to another application.