T250295 introduces an alert within the Reply Tool to make people aware when a new comment(s) is added to a discussion they are drafting a comment within.
This task is involves the work with adjusting the user experience to increase peoples' confidence that the comment they had been drafting will be retained if they decide to view the changes that have been made in the time since they started drafting said comment.
Story
As someone who is deciding whether to view the changes that have been made to the discussion I am drafting a comment within, I want to be confident that what I've written so far will be saved if I opt to view said changes, so that I do not need to choose between potentially losing the comment I've written and viewing changes that could cause me to adjust said comment.
@Sdkb and @Tol surfaced this issue on mediawiki.org in Topic:Wpuwe8vo9cxoww2z and Topic:Wpyqp2rqvds7epwv.