Woocommerce cropping not working as it should?

Question

I have tried just about everything I can find on the internet. Here are my current woocommerce cropping settings:

The problem is, after I re-generate the images and I go back to this page, I end up with this:

Why would it do this and how can I fix it?

UPDATE

In fact, it doesn't reset the hard crop settings after I regenerate the images. It simply saves it as "hard crop" checked after I uncheck them, even though it initially shows that I've changed it?

UPDATE 2

It seems to be related to this.

UPDATE 3

I tried adding this:

add_action( 'aftersetup_theme', function () {

    // Add image sizes
    $shop_thumbnail = wc_get_image_size( 'shop_thumbnail' );
    $shop_catalog   = wc_get_image_size( 'shop_catalog' );
    $shop_single    = wc_get_image_size( 'shop_single' );

    // In the lines below, true = hard crop; false = proportional
    $shop_thumbnail['crop'] = false;
    $shop_catalog['crop'] = false;
    $shop_single['crop'] = false;

    add_image_size( 'shop_thumbnail', $shop_thumbnail['width'], $shop_thumbnail['height'], $shop_thumbnail['crop'] );
    add_image_size( 'shop_catalog', $shop_catalog['width'], $shop_catalog['height'], $shop_catalog['crop'] );
    add_image_size( 'shop_single', $shop_single['width'], $shop_single['height'], $shop_single['crop'] );
}, 20 );

And then I re-generated the images, and still no luck?

UPDATE 4:

The site can be viewed here:

http://www.diamondcouturelondon.co.uk/

UPDATE 5:

The plugins installed include:

• Contact Form 7
• Lollum Framework
• oAuth Twitter Feed for Developers
• Regenerate Thumbnails
• Revolution Slider
• WooCommerce
• YITH WooCommerce Wishlist

UPDATE 6:

I disabled ALL the plugins except for WooCommerce. I then went to this page:

/wp-admin/admin.php?page=wc-settings&tab=products

There I again unchecked "hard crop" next to all items. I pressed save. Upon reload, the items are unchecked, but if I refresh the page, they are checked. So the changes weren't saved. In other words, WITH ONLY WOOCOMMERCE enabled, it STILL doesn't save my hard crop settings.

That leaves me with only one other possible external influence --> the theme. But I can't see how that can be affecting it.