Pagination problem in Virtuemart 3.0.9

[eyes888]

System: Joomla 3.4.1
VM: 3.0.9
PHP: 5.6

When you start browsing from child category (menu link) and you are at page 3 example you click on a product see some information.And then want to go back You will always get the page 1.

steps:

( greate many products,category and child category to test this pagination problem)

1.Joomla Backend - in joomla menu manager you created virtuemart parent category and child category links (menu item type: virtuemart-Category Layout).
2.Joomla Frontend - you start browsing products by clicking Child category link in menu you just created.
now you see many products and pagination < 1 2 3 4 5 > you on page 1.
3. you click next or (some page nr. example page 3 link)
4.in page 3 example clicking in product opens product detail page. next in product detail page I choose to go Back by clicking back button in web browser and now opens page nr. 1  but expected result should be page nr.3 in this example.

in virtuemart version 3.0.8 this working OK but version 3.0.9 this pagination problem started.

(just for  test) if you copy file  product.php from
VM version 3.0.8
administrator\components\com_virtuemart\models
and paste to
VM version 3.0.9
administrator\components\com_virtuemart\models

then pagination works ok

something changed between VM 3.0.8 - 3.0.9 -  may be this problem is related with changes in file product.php from
administrator\components\com_virtuemart\models

Please fix pagination.