I've had exactly the same problem since we've moved to the new software. At first I thought I'd lost all my work, but after resigning-in as prompted, I use the BACK key to return to my posting and repress SUBMIT. However if I've used an attachment, that has to be reselected. A little complicated perhaps, but better than retyping the whole thing.
We cannot change the waves of expansion and contraction, as their scale is beyond human control, but we can learn to surf. Nicole Foss @ The Automatic Earth
Common Weeds And Wild Edibles Of The World (HD video)