The content of the OUTLINE is deleted, regulary

How can i prevent that, the content of the OUTLINE is deleted?

I cant find a cronjob. Nothing in the admin section either.

What can be done about it?

Thank you.

Usually Outline content shouldn't be automatically deleted. It can be deleted if original content is deleted or module is uninstalled. So check if original content is still there and Timeline modules wasn't re-installed.

Module was not uninstalled. And the content is also available.

But the still, the outline content gets deleted once in  a while.

I cant see any pattern to this.