1- add to cart keep loading and never ends 2- sticky add to cart not fully visible in mobile view

Hello,

Thank you for reaching out to us.

We recommend that you disable all third-party plugins that are not included with XStore (https://www.8theme.com/documentation/xstore/plugins/included-plugins/). After doing so, please clear your browser’s cache and check again. It is possible that one of these additional plugins is causing the issue.

Let us know the results.

Warm Regards,
The 8Theme Team

Hello,

By default the buy now button should not be shown on mobile in the sticky panel, it can appear in case you are using a cache plugin or CDN.

We can offer you to add the code into Theme Options > Theme custom CSS > Global:
this code can be used to add a scroll https://gyazo.com/9564b345cce274c0b8b1d94f7aec33bb

@media only screen and (max-width: 992px) {
    .single-product .etheme-sticky-cart .et_column:nth-child(2) {
        justify-content: flex-start;
        overflow: auto;
    }
}

or this

@media (max-width: 767px) {
    .etheme-sticky-cart p.price,
    .etheme-sticky-cart .quantity ~ .et-single-buy-now {
        display: none;
    }
}

to remove the buy now button – https://prnt.sc/962l1TXSdFjU

Warm Regards,
The 8Theme Team