When tagging an article for CSD using Huggle - if you add a comment and specify the reason as G7 (Author requests deletion), the tag is inserted into the edit, but without "rationale=". This results in the comment not being rendered (see https://en.wikipedia.org/w/index.php?title=Wikipedia:Meetup/Nashik/January2016&oldid=699913065). I had to manually insert it for the comment to render properly (see https://en.wikipedia.org/w/index.php?title=Wikipedia:Meetup/Nashik/January2016&oldid=699913107).
I'm almost certain that this is extremely low priority, but I figured I'd open a ticket and let you know about it.