How to make friends Yii pager and browser back button?

Question

Yii

There is a main from it when loading an ajax request (let's say on site / else) for lazy loading. Works well. But there is a bug. We go to page 2, on it clicks "back" in the browser, the main page is loaded and ajax goes, but not to site/else, but to site/else?page=2.
Any idea why? Is the pager's data cached, and if so, how to reset it?

Answer 1

Problem solved, thanks everyone. There was a hiddeninput in which the page number was written and when going back it remained old, but it was necessary to reset it. Thanks to everyone who read and didn't reply.

Answer 2

Use Pjax, it's there from the box.