When I select all records in manufacturing or sale orders in tree view , it prints a pdf for all records for three or four times and after that it prints random records or one. Actually sometime it prints all records and sometime one record and sometime random records. While html and text type report is accurate everytime.

And When I restart server and refresh page, above discussed process happens again. I think this issue relates to wkhtmltopdf library, but I tried all versions of it (0.12.1 to 0.12.5) , but bug still remains.

Any help will be much appreciated. Thanks