If we are viewing our tickets in a filtered view (that is, a list of Open Requests, Pending Requests or some other custom view) and check to select the ticket then click the Edit Request button at the top, then only change the Request Status, the request loses Group and Technician assignment.

If you look at the screenshot, this is what we see in the history tab, making it appear that the Technician actually changed those fields when in fact ONLY the Request Status field was adjusted.

Let me know if you need more information to replicate.