I have a problem  with qweb report when I print a lot of page I miss header and footer ,

but when I print three or four page all of things ok I make sure my code that's ok and I work on wkhtmltopdf 0.12.0 but some people told me I must to remove or change the value of the web.base.url in system parameter

when I removed it I get the css and footer but header is missing 

and when I change the value of it to http://0.0.0.0:8069 or http://127.0.0.1:8069 or http://myIP​:port

I have the same problem when I print a lot of page 

Please help me how can I solve this problem .

Thank you so much.