We would like the feedback system to remember the filter you last used on the feedback page. Right now, we show the relevance filter by default to readers + editors, and the 'All comments' filter to everyone else, but if you change the filter then refresh the page, we do not remember which filter you were using before you refreshed.
This is something we would like to change, if possible, so that whatever filter you were using last is always shown, until you change the filter again. This would happen in cases where you refresh the same feedback page --- and possibly as well as when you go to another feedback page for a different article (subject to feasibility study and subsequent community discussion).
(This could potentially be done with the same cookie that also stores your last post, so we could hit two targets with one stone.)