Thanks for the foolow up. This confirms that the shortcode is indded working correctly, but either the script is missing or there is a JS error on the page preventing it from working.
Can you please open your console log and report any JS errors on the page?
Lastly, search through the 3rd party plugin to find out how the script is included. Perhaps it is using the ‘the_content’ filter to add the script? If this is the case, then you will need to run your ACF value through this filter like so:
echo apply_filters('the_content', get_field('field_name'));
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