Download multi-submissions PDF: same data on every page

Hello,
this project is very great!!!
I've a little question:
I use D7 with webform 7.x-3.18 and webform2pdf 7.x-3.x-dev
If I download pdf with multiple submissions I obtain a multi-page pdf with the right number of the submissions, but every page has same data.

I open an issue in Webform2Pdf: http://drupal.org/node/1956336

I think that the problem is on webform.module where there's

function _webform_filter_values($string, $node = NULL, $submission = NULL, $email = NULL, $strict = TRUE, $allow_anonymous = FALSE) {
global $user;
static $replacements;

....

If I remove static $replacements; it work fine.

Please review