Firefox back button only works the first time, not the second time

I have a site where you can search for things with dates and more. When I submit the form, I am taken to the results page, when I click the Back button I go back to my search page and populate the values. This works in IE and FF.

however, whatever I do, when I go back over and over a second time , the values ​​are lost in Firefox, whereas IE and other browsers still remember the filled values. whatever I do on the search page it doesn't remember the new state, only the original first state. Even when I check the values ​​of the form before submitting, it shows the correct values, but on return, it is lost.