There have been a couple of occasions where I have filled in the title and keyword fields of several images to submit for review. Suddenly it switches to the Adobe Stock login screen, when I start to fill in the email box, it goes back to the previous new content screen and all the work I have done is gone. Any solutions?
This sounds like a (very annoying) web browser issue. I would advise you to use a different browser entirely if possible. If not, try clearing your cache/cookies and see if that fixes it. Otherwise, hit that save button on a regular basis to keep your progress in place regardless of whether you get kicked out or not.
I've not experienced this issue myself and I have not heard of any other contributors with similar reports in the past but I'll keep my eyes and ears open.
Either way, I can only imagine how frustrating that is. Hang in there!