Problem adding to wishlist.

Problem adding to wishlist.

Good day.
I use wp-optimize plugin to cache the pages of my site.
The problem is that in some of the cases when I have a cache generated, the add to cart button starts loading but does nothing. I’ve tried a lot, but at the moment I can’t figure out the reason for this. If the cache is disabled, it works correctly. On some of the cached pages it works as it should, on others it doesn’t. When I clear the cache the same thing happens on different pages.
I tried with Ajax loading enabled, but then in some cases the button is not displayed at all.
I notice the problem mostly with a logged-in user, which I’m not sure if it’s related.
Please help how to fix this problem.

I leave links where you can visit the site.
beststore.bg
https://www.beststore.bg/product-category/%d0%be%d0%b1%d0%b7%d0%b0%d0%b2%d0%b5%d0%b6%d0%b4%d0%b0 %d0%bd%d0%b5/
https://www.beststore.bg/%D0%BF%D1%80%D0%BE%D0%BC%D0%BE%D1%86%D0%B8%D0%B8/?product-page=2
You can use user:
user: [email protected]
pass: [email protected]

At the moment I’ve disabled the Ajax loading as it has less problems that way.