Most forums and many websites (like gmail) are able to save your post in a cookie as you type. If you navigate away by mistake, the post will be waiting for you if you go right back.
Does the billion dollar forum have that feature? I got so used to it I forgot this forum is so old... :/
I have noticed this a thousand time and then I have decided to use copy my comments after I draft it if I suspect that it's lagging.
Unlike Gmail that uses Internet access for its "Drive" except you opt for offline sync, Bitcointalk forum doesn't function that way.
I can't say for sure if it will be visited but for now, you'd have to save your drafts by copying and pasting after a refresh.