ownnote and tinymce problems in Nextcloud 11

Hi there,

I get the browser debug messages that it cannot load the tinymce because of security policy. I added the policy of others own cloud apps but it does not help. In some circumstances it worked for a short time until restart of apache. Sometimes I get a not editable text of the note. Normally it does not show my editor or text. Tried activation of ssl and a ton of other ideas from this tracker but it does not come back.
Owncloud 8 did work before I did update, so it should not be a problem with apache or setup files.
Update to new tinymce does also not help.

Any ideas?