Another thing that I’ve noticed is that after submitting a comment, sometimes the comment appears in the list of comments, but also the text remains in the editing textbox. This leads to sometimes thinking the first submit didn’t work, and submitting again, and thus double-posting the same comment.
Other times, the text does correctly get removed from the textbox after hitting submit and the submitted comment appearing, but the page continues to think that you have unsubmitted text and to warn you about this when you try to navigate away. Again, a confusing experience that can lead to double-posting.
Another thing that I’ve noticed is that after submitting a comment, sometimes the comment appears in the list of comments, but also the text remains in the editing textbox. This leads to sometimes thinking the first submit didn’t work, and submitting again, and thus double-posting the same comment.
Other times, the text does correctly get removed from the textbox after hitting submit and the submitted comment appearing, but the page continues to think that you have unsubmitted text and to warn you about this when you try to navigate away. Again, a confusing experience that can lead to double-posting.