Deleting all the content while saving if 'some

After having tried to de-ectivate a lot of extensions, I still ended having the same problem.

I can only suggest to other people who may enconter the same problem to always keep a backup version that cannot be overwritten (there's an option about that), because half of times when the content is deleted while saving, also the saved version is saved empty!

this is strange
can you confirm if this problem also occurs if you do the same into a native article (without page builder) ?

The problem occurs only using Pagebuilder CK, also in another website I own.

If I write the same things in a normal Joomla article, no problem.

can you give me an admin access by email, so that I can check myself and see what happens

I have found the problem, disable the plugin
JHackGuard Plugin

and it works

I have made a page "testced" where you can see it working, and test
(actually I have republished the plugin like it was)

It worked!
Now I know that I need to keep disabled that "JHackGuard" plugin while I work with Pagebuilder CK, and then re-enable it again.
Thank you!