It happens half of the time, rest of it is when I actually stay in the webpage.
Aaaaaand it still happens now.
Another bug: When you submit another forum post in less than 60 seconds and when you wait enough, it says you ALREADY submitted and it appears nowhere once you find out, it occurs when you stay on the same page you typed on, kinda obviously for if you wrote something large or you just do not want to write it again. I suggest making it NOT count when at the page you enter after clicking RETRY, where you have all your text again.