Enter/Newline is not working (two spaces at end) with comments?
Because other formatting working. Do I miss something?
AFAIK this has always been the way of comments on SE sites. It's annoying (especially for code in comments) but then a general policy of the network is to avoid extended discussion. I think having a little nasty formatting like this actually dissuades people from getting bogged down in the comments and makes you think about posting an actual answer or editing something that's already in place.