[plt-scheme] handler:edit-file in Windows

The documentation for handler:edit-file says:

"This function creates a frame or re-uses an existing frame to edit a file."

As far as I can tell, in Linux and MacOS, it always reuses an existing
frame (when present), while in Windows it always creates a new frame.
Is this the intended behavior?  If so, is there some other procedure I
should be using to switch to the tab containing a given file?

Thanks,
Greg