Editor logs me out unexpectedly: "Session Expired"

I was working on a post in the editor when it suddenly logged me out with a “Session Expired” pop-up.

I lost quite a bit of editing work, which is really annoying.

What could have caused this? I makes me very reluctant to use the editor if I have to resort to saving every minute. Feels like the nineties all over again, for the wrong reason.

This is happening to Us also. Getting this error repeatedly, all progress is gone after this. Please Webflow resolve this.