Hey daniandres,
Try adding this code to the end of your functions.php file in Appearance > Editor:

function change_checkout_url( $url ){

    // Force SSL if needed
    $scheme = ( is_ssl() || 'yes' === get_option( 'woocommerce_force_ssl_checkout' ) ) ? 'https' : 'http';
    $url = site_url( '/custom-page/', $scheme );

    return $url;
}
add_filter( 'woocommerce_get_checkout_url', 'change_checkout_url', 10, 2 );

change /custom-page/ to your page

Best regards,
Mike

Hi,
Your images are showing at 262×262 but are only 180×180,
Please try going to Settings > Media and increase thumbnail sizes to 262x262px and then regenerate thumbnails using this plugin – https://wordpress.org/plugins/regenerate-thumbnails/

Best regards,
Mike

Hi,
Try inherent instead of none.

Best regards,
Mike

Hi,
Please see this post: https://kriesi.at/support/topic/external-link-in-ajax-preview-portfolio-item/#post-590769

Best regards,
Mike

Hi,
Try this: https://kriesi.at/support/topic/changing-the-duration-of-the-page-preloader/#post-717559

Best regards,
Mike

Hi,
Well done, it looks very good.

Best regards,
Mike

Hi,
Try this code in the General Styling > Quick CSS field:

.page-id-3173 .avia-builder-el-28 .avia_transform .av_font_icon {opacity: 1.0 !important; }

Best regards,
Mike

Hi,
Can you please explain what you mean, because it appears to be mobile responsive on Android. How is it not mobile responsive for you?

Best regards,
Mike

Hi,
On your example link, the product gallery images are opening in lightbox for me in Chrome and Firefox, which browser are you using?

Best regards,
Mike

Hi,
Try:

#top #header .av-main-nav:hover {opacity: 0.5;}

#top #header .av-main-nav > li:hover {opacity: 1.0!important;}

While researching I found some js that may work at the bottom of this page: Hover on “Everything But”
is this the article that gave you the idea?

Best regards,
Mike

Hi,
I see the error on your site, editing a text box with content open a new box instead of the one clicked, but using the debugger to copy the page to a new install makes the page work correctly. I see that you tried disabling your plugins with no success, but this behavior points to a plugin. Can we try disabling your plugins to test further?

Best regards,
Mike

Hi,
The console is show this error: “Slow network is detected. Fallback font will be used while loading” After deleting two of your cache plugins this removed the error, please try clearing the caches again and disable the cache and minify to see if this works for you also. I believe the multiple cache plugins are working against each other.

Best regards,
Mike

Hi,
You are receiving a 404 on admin-ajax.php
you are using PHP Version: 5.4.45 please ask your host to update to v7, this is the new standard for WordPress.
Also check with them about Suhosin being active, this may override PHP server settings. Suhosin is an advanced protection system for PHP that may be giving a false positive and blocking admin-ajax.php
I see this warning in your layerslider > system status >

Best regards,
Mike

Hi,
For issue 1, I do see the issue in mobile view, up to 426px, in Edge, so try this quick css:

@media only screen and (max-width: 426px) { 
.page-id-3689 .avia-builder-el-21 {
    padding-top: 20px!important; 
}
}

but not in higher views, but if you do try adjusting the max-width to match when you see the issue, also adjust the padding number to suit your needs.
For 2, this issue is because Edge doesn’t render list-style-position correctly when they are set to “outside” to fix it we need to set them “inside” but also make the second line of the list text indent.
First try this quick css:

.page-id-3274 .entry-content-wrapper ul {
    list-style: disc inside!important; 
}

If that doesn’t work right try this instead:

.page-id-3274 .avia_textblock ul li:before {
    display: list-item;
    content: "";
    list-style: disc inside;
    float: left;
    position: absolute;
    left: 0;
}
.page-id-3274 .avia_textblock ul li {
    list-style: none;
    padding-left: 13px;
}

If that doesn’t work, please include a admin login in the private content area so we can take a closer look.
Please clear site and browser cache.

Best regards,
Mike

Hi,
When trying to reproduce the issue I experience random page reload while the page is loading, meaning that the pages are being interrupted during the load, thus the screen flashing in your video. In the console you are getting “slow network” errors, and once I received a “site offline” message, but that could be because of my location (US) vs your host.
I suggest disabling your plugins. If that resolves the issue, reactivate each one individually until you find the cause.
Also check if your host is limiting your bandwidth, some cheaper hosts offer “unlimited” sites, but they limit the number of connections or speed. Try checking your cPanel > CPU and Concurrent Connection Usage, often it is a bar graph that will be red when you are hitting your limits. Or just ask your host if this is happening on your plan.

Best regards,
Mike