The default views of the bugtracker are sorted by descending date, i.e. newest date at the top. Whenever a change is made the date is updated, and the list is resorted. So, when you change something in your report, e.g. add a comment "ping" or maybe something more descriptive like "Any news?", will move the report up to the top and bring it to the attention of the developers again.
Just adding a comment to a resolved report has a good chance that it will not be noticed. Because the report is still marked as "green" - the developer (well, I am talking of myself here, but others probably will do the same) will not open any green report to look whether anything has been added. Better to re-open the report and, if possible, to set its state to "feedback" which gives is a very prominent color (I am not sure whether you can do the letter step as reporter, but it is important that the green is gone).