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Looks like the problem with the select2 library. Do you see the problem if you load fewer entries (500 for example) and no limit on the displayed result? I tried searching and found only this result but it's not 100% the same issue.

Hi, the sizes value returned is not the sizes attribute in responsive image. It's an array of the following info:

[sizes] => Array
(
   [thumbnail] => Array
       (
           [file] => press_image-150x150.jpg
           [width] => 150
           [height] => 150
           [mime-type] => image/jpeg
       )
   [medium] => Array
       (
           [file] => press_image-4-300x194.jpg
           [width] => 300
           [height] => 194
           [mime-type] => image/jpeg
       )
   [large] => Array
       (
           [file] => press_image-1024x665.jpg
           [width] => 1024
           [height] => 665
           [mime-type] => image/jpeg
       )
   [post-thumbnail] => Array
       (
           [file] => press_image-624x405.jpg
           [width] => 624
           [height] => 405
           [mime-type] => image/jpeg
       )
)

To get the sizes attribute, we can use the following function:

wp_calculate_image_sizes( $size, $image_src = null, $image_meta = null, $attachment_id = 0 )

So, in your code, you can do like this:

foreach ( $images as $image ) {
    $sizes = wp_calculate_image_sizes( array( $image['width'], $image['height'] ), null, null, $image['ID'] );
    echo "\n<a href='{$image['full_url']}'>\n<img src='{$image['url']}' width='{$image['width']}' height='{$image['height']}' alt='{$image['alt']}' srcset='{$image['srcset']}' sizes='{$sizes}'>\n</a>";
}

Hi @jonwatson87,

I'm very happy to see you figured it out. The way you use the helper function is correct!

Hi @Maxell, can you please clarify the idea? I'm not sure what you're talking about.

Hi @sociality,

Thanks for your feedback. I've just found the problem with Group's JavaScript and made a fix for it here http://pastebin.com/YhzB331K.

Can you please download this and replace the group.js file in the Group extension? I will update the extension if the patch works.

Thanks a lot.

Glad that you have resolved this 🙂

Hi @weseo, sorry for the delay. Now it's safe to include all extensions into themes/plugins. Please follow this instruction:

1. Copy extension folder to your theme
2. Open "functions.php" and add the "include" line to the extension main file

That's all. Enjoy 🙂