Hi there. What happens to me and everyone else is that the time out happens and the words can be lost. At this point I do not think your words are stored anywhere unless you saved them.

I do something that prevents my posts from being totally lost. Before I post I highlight all the text of my post and copy it (CTRL + C) and if I am timed out I can paste the text into a new window after I relog in. I am not sure of the exact time but I am guessing about 20 minutes before automatically logged out.

I moved this post to technical support because it seemed to be more appropriate to your question.