BUG: changing title in imported chapters in study does not change in the downloaded png.

Hi, I've found a bug in the studies.
I usually import new chapters using the png import tab, but then I change the title for some reason.
I noticed that when I download the png the title stays the same as the originally imported pgn.
The chapters not imported using pgns are not affected by this.
It would be nice if the chapter titles in the downloaded pgn is in sync with the title of the chapter even for imported chapters.
Thanks