They slow down the checkbox. How to fix?

Question

css

There is a site . In the filter on iphone (6, 10 chrome and safari), checkboxes are slowed down (Not immediately put). This is what the client claims. I checked no problems. How to make it work properly?

Answer 1

I also checked, no problem. Let the customer throw off at least some proof. Then it will be possible to figure out what is not working where

Answer 2

The problem really is, on 5, on ipad (9,3,5) in safari. At first everything is fine, then suddenly it freezes and starts to die. I do not see any requests, events on them.
Oh, this ayos, in which "nothing ever slows down and does not buggy"