CommentDeletedEvent is not getting triggered.

I have written crucible event listener plug-in to listen to events. The plug-in is able to listen to CommentCreatedEvent, CommentUpdatedEvent... but CommentDeletedEvent is never triggered/invoked by crucible tool even after comment is deleted from Review.

I have programmed the listener for crucible 2.9.2 version. The same plug-in used to work on crucible 2.6.0 version.

The listener can be found as attachment.