I find the following occurring bug weird.
When I post a comment I start with @someone.
But for some reason this does not always get into the text.
I get no error message but it is not there.
In the beginning it occurred so little that I started to doubt if I perhaps forgot it. But it occurred more and more and even with edits I am now not always able to do it. It seems to appear more often to people with a rep below 100 if I'm not mistaken.
Assuming I do not have a keylog or something I post this.