Over the past couple of days I've experienced a few times that I was given an old page after saving. It used to be that you would be guaranteed to see a fresh rendering of the content you just saved.
@Lionel_Scheepmans reports this is still happening, specifically it happened with https://fr.wikiversity.org/w/index.php?title=Projet:Wikiversit%C3%A9/Journal_scientifique_libre&diff=499357&oldid=499353
Ok, and thanks for your attention. But finaly, I've just made a mistake editing just before my signature but looking for my edit in the begining of the paragraph... Sory I'm some time very inatentive... So in my case it was nothing to do with a technical problem.