Weird "Sort by" issue. Not working on larger displays

The product “Sort by” and items per page selectors do not work on my site when viewed on 1920 x 1080 resolution screen. Mobile is just fine, but on PC I have to shrink the window down to half that to get them to work. Full window seems to disable the function. Edges, Firefox and chrome browsers all have this issue

Please take a look by visiting any category at
CS-Cart Ultimate v4.16.2.SP! with Unitheme2 v4.15.1.d

Works for me in Firefox.

try Sort By: Newest or 64 products per page, does that work for you?

When I click on any of the sort options, they just disappear and no change to page.
Shrink the window size to about 960px wide and everything works correctly. Thinking it is some css or @media value setting somewhere but can’t for the life of me figure it out

I see what you’re saying now. No, they are not changing for me. I’m not sure what’s causing that.

My guess is it’s 3rd party related because the demo works fine.

if I’m not mistaken, I noticed it after the v4.16 update of CS-Cart
I need to go through the trouble of updating Unitheme2 and all the layouts for the new version to see if that fixes it. Same issue is present in the lower half of the “Fly Menu” as well.