I am web developer and I have faced a strange problem.
On our site we have mobile version of search page (http://test.option.by/ms). When you select any option from the first drop down list, number in the bottom bar changes. (jQuery $.get request working in background). But when you reload page using button in the address bar, the same use case doesn't work at all. After selecting the same option in the first drop down list all js on page stop working. After reloading page with drag down, everything works fine again.

What is the difference between reloading page with drag down and reloading page using button in address bar?

Thanks in advance!