Would recommend trying in a Windows Sandbox environment to confirm if something unrelated to ObjectDock is affecting how your Task Manager behaves.
Following your steps in my testing with Windows 10 Sandbox environment:
I can see the Sound application running as a child process under Windows host process (Rundll32), but not as a child under ObjectDock. It behaves this way whether Sound is launched from desktop or on from ObjectDock.
With Windows 11 Sandbox environment:
With TeamSpeak, the issue still isn't reproducing for me.
Adam McGuinness
Customer Support Specialist