I just confirmed it, on my system too. I made sure that "lock contents" was not enabled in the staff window. Using 'floating' staff window.
Interesting. Kronosman, as a workaround, if you use "lock contents" in the very top left corner of the staff view window (left click), then when you select a new track and open staff view you will get a new window with the staff view for the selected track(s).