Hi, kroenerdesign
We only support Joomla base field types for Megafilter and do not support custom field types from extensions. To prevent the issue you mentioned, please replace the file root/plugins/jamegafilter/content/helper.php. If you want to customize your logic for ACF custom fields, you can start from line 794:
case 'acfwhatsappctc':
// customize your logic for extension custom fields here
break;
Additionally, please note that DustJs does not support writing complex PHP syntax like loops, conditions, or comparison statements.
Regards,