[Resuelto] Custom predefined image size not used

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[martijnH]

I have predefined a custom image size in my functions.php:
add_image_size( 'hero', 1900, 450, true );

In a view I use this format:
[types termmeta='bedrijfsthema-achtergrond' size='hero' url='true'][/types]

The view is used on:
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I expect to see the cropped version (I use https://wordpress.org/plugins/crop-thumbnails/ to adjust the crop region):
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Instead I see a file which seems to be generated by Toolset (notice the "wpcf_" in the filename):
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I would like to see my own cropped version of the file and not the "wpcf_" version.

Thanks!
Martijn