Also has happened to me but i have evolved and started using word, and then copying and pasting and also refreshing before i put it on,
A good idea is to copy (and thus store to clipboard) whatever you wrote before hitting any of the buttons. It is an extra step, but I find it isn't too tedious. Regardless backing up your work offsite is a good idea, but feel free to do as you wish.
Anyhow, assuming the timeout is intentional, this would fit better in the Wishing Well. Getting rid of the timeout completely would be nice, but I have no idea about the technical side of things, so for all I know it might not be doable. Maybe having some warning about timeouts would be a good compromise, so it doesn't catch anyone off guard.
If the fix is easy, I'm sure people would appreciate removing the potential of losing work.