When replying (via a comment) to a comment on a question of mine, the comment box
- got grayed out when I pressed
- stayed like this for some time
- and then the comment was posted in double (with ~10 seconds in between the comments - which corresponds to the press, then the ~10 seconds of grayed out, and then normality).
I kept both comments just in case.
Details on the system: Windows 10, Chrome 69. I usually poste/comment from that machine and this is the first occurance of the bug.