I was distracted - my wife had some tasks for me meanwhile

And I learned on hard way not to refresh anything when writing the post (or at least when editing). When I edit the post, then sometimes I cant save the edited post (simply nothing happens). Now, when this happens, I copy the whole post and then refresh the sheet. As result the editing window is closed! After I lost some work this way, now I open the post anew for editing, and paste it over with copied text. I haven't tried yet, how new post will behave, but logically not very differently!