Comment character count does not reset when posting the comment
Whenever you are typing a comment on a post, there's a live-updating character count that shows how many of the allowed 500 characters you have used so far.
However, when you post the comment, the indicator doesn't reset.
So if I write a comment "Hello world!", the character count quite correctly indicates that I have used 12 out of 500 characters. When I click Post to actually post the comment, then the comment shows up as such; the comment text field is cleared; but the character count still indicates 12/500.
At a minimum, the character count should be reset when the comment is posted, to match the UI state when one is just starting a new comment.