Sorry for my bad English.
I've installed the last version and when a save changes on the pagemanager... all are deleted... and a "NEW PAGE" are created.
I've tested with Firefox and IE, no problem.
Google Chrome est à jour
Version 71.0.3578.98 (Build officiel) (64 bits)
after this happens, try following:
1. Go to the CMS config (settings => CMS)
2. Check "Use => H1only_pagesplitting:" - is it empty or "true"?
If it is "true", make it empty, are the pages back now?
Maybe it is that: viewtopic.php?f=8&t=756
Now I'm outdoor for a few hours,