Hi Ofi, thanks for your assistance.
I mean something different like Andreas pointed earlier.
The builder add code which was never type in like blank characters and "<p></p>".
As you can see in the Screenshot https://prnt.sc/4QxhwfhXDcLm from left to ride:
In The Content Editor is a new row added.
In the Code Editor you see the Code.
This results in a shifted content. :-(
I remove the code and everything is fine again but sometimes it appears again. I have not reproduced that so i cannot tell you at the moment, when this happens. If i find out, i will post it here.
I am using the Layout Florist. Joomla, SPPB and JCE are up to date.