Often I draft a comment then am faced with the 'are you a bot' challenge due to failure to login or login timed out.
While still in draft mode, when I login in, the forum window returns to a blank entry. I have found that clicking 'back' at this point reverts the window to the content of my post draft. All is not lost.
It might be less confusing and frustrating if after login on draft, that the window content be restored instead of appearing to be cleared and lost.