Wrong result in pdf output

Hi,
I'm trying to create PDF report with version 6.0.5.
In the easiest form, when nothing have to be displayed, the view a print preview are ok, but in pdf output the pink banner whit the message
"No data to display on this report"
appears misplaced, starting at the center of the page and ending truncated at right margin.
Additionally a lot of graphs (e.g. Audit connections) have black background in pdf.
Is this a problem of my installation ?

The only workaround I found is to use older html2pdf classes that don't have these problems.
Please, let me know.

Hi.
I tried different pdf readers with the same result. I put the pdf file in attachment, so you can try by yourself.
I can add some more infos.
I run projeqtor from two different servers and from localhost; form one server whit php5 I get the right result, the other server and localhost with php7 produce the file as you can see.
Other difference can be seen in attachments.
Best regards