Try this
BatRay, That happened to me a couple of times also. This is what I do to be safe. When I finish composing the post, and before I hit the send or preview button, I highlight all of the text by dragging the mouse over it (with left mouse button), then "right mouse" and choose "copy". Your text is now copied to your computer's clipboard. In the event you find yourself knocked off, just start a new message, click inside the message where the text goes, and "right mouse" and choose "paste". Your entire message is instantly copied back in without typing it. It only takes 2 seconds, and saves a lot of frustration. I know it's only a workaround, but at least it can't happen to you again. Until they fix it, (not that it's broke), that copy will save you lots of typing.
Take care,
Jim