Filter Function not working

Hi,

I have noticed that the filter function isn’t working the same way the Search function does. For example:

In the Search you select the 1st dropdown which then activates the 2nd dropdown and from a selection in the 2nd dropdown it then activates the 3rd which then you click SEARCH to get a result.

If you go onto a product page as I have linked for you and then select the first dropdown it does not activate the 2nd dropdown.

I can get this to work by selecting the 1st dropdown and then clicking the FILTER button which then shows results on the page and activates the 2nd dropdown. Then again click the FILTER button which then displays results and activates the 3rd dropdown.

Should the dropdowns not automatically activate once the a selection has been made just like in the SEARCH function?

I had this issue previously with the search which you then gave an update to replace require() with require_once(). Could there be a similare issue here for the filter part? There are no errors in error_log file.

The page I need help with: [log in to see the link]