Solution for cart reloading the last item removed

Following a development throught Freelancer, i now have a trouble with my cart. Platforme: wordpress, woocommerce, divi theme. Products used: - single product: ok - grouped product: not ok In the previous development made here, we created with the freelancer a grouped product to follow one of our goal. But now, when i add into the cart one of this grouped product, i can't delete it after. Let me explain in detail: 1- i add 1 item #1, then a second item #2, then a 3rd #3 2- go to cart and delete #1 –> OK(page doesn’t refresh). Delete #2 –> OK (page doesn’t refresh). Delete #3 –> NOK. Page reload and the latest item added is back to cart! I’ve chech also some forum talking about Ajax and … it might be cache trouble but i don’t have any cache pluggin.. Please check hereby the trouble reproduced for this youtube video: [login to view URL] It might be something due to cache or Ajax... Also, regarding cache, i'm looking for advise regarding a cache pluggin if you can recommand one. [login to view URL] In advance, thank you for your help.