Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpdocx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
and another self-reply :)
Seems to be a LibreOffice problem. I rebuilt the template using M$ Word and it worked halfway, i.e. the table and the trailing $BLOCK_table$ where removed, the leading one was still there, probably some leftover artifact from LibreOffice.