Hello,
i have overwrite the QWEB-Code with my completely own code and now it works.
It looks like the default report template is hidden somewhere and the right way is to change QWEB.
But in QWEB on older versions of odoo we have the template and have only to modified and now you have only a call and have to write your own template in the QWEB Code window.
For me it works but this way looks more complicated as before... if this change from template to call is recommended then please on all places and not only on products and on locations labels not.
I have some write a little documetation for me if someone have the same problem please ask me for the docu.
Regards,
Borris