Hi, Elise.
I followed the exclusion instructions in the link: https://xtemos.com/wordpress-performance-optimization-the-ultimate-guide-in-2021/#Step_3
And the remove button is working now

The only thing that still bothering, that when you go to the Wishlist page, you’ll find it empty, tell you refresh the page manually, and only then – the Wishlist added products will appear

And because I can’t ask the customer to do the same, I have to solve this!

Can you please, help

Thank you.