Application doesn't move to front when given focus from Task bar

I have an application that I'm running in debug to check out a piece of functionality I just added. As I was doing this I discovered the application does not move to the front when it's portion of the Task Bar is clicked.

This only seems to occur when I have one of the "child" (not technically an MDI child) forms open to display status of a task the user has initiated.

That child form is NOT present on the Task Bar (the idea being it's part of the same application so it shouldn't get it's own slot on the task bar).

Any ideas what the cause may be?

EDIT: Trying to elaborate a little. The issue is this, I'll have the application up & running, open a different program (Excel, Chrome, etc.) and that new window will appear over my app. I will then click my app's icon in the task bar. It appears to get focus, but the window does not move to the front, Excel (or whatever) is still on top of it. The only way to actually see my application is to minimize/close any other programs running on that screen.