So after a certain amount of time without submitting or clicking on anything within the site, the site will think you aren't there and it will "log you out" and then when you click to submit if you have "timed out" it will ask you to log in again. It is a built in "security precaution"

One workaround that we have been known to use, is that if it has been a significant amount of time since you have clicked on something in the site and you are possibly timed out, you can copy your text in the post and then hit submit. If it asks you to log in again, when you do, you will have all of your text copied and ready for pasting.
Another workaround that we have done is to open a 2nd window and click to make a new post. If asked to log in first, we know we've been timed out, but we have the first window with the text in the post box to copy and paste into the newly opened second window.
Hope to read the next WWN post.