This is caused by the check constant MB_FRONTEND_SUBMISSION_DIR in wp-content\plugins\meta-box-aio\vendor\meta-box\meta-box-conditional-logic\conditional-logic.php:
if ( ! is_admin() && ! defined( 'MB_FRONTEND_SUBMISSION_DIR' ) ) {
return;
}
This constant is not used in Frond End Submission, but instead MBFS_DIR is defined.
However, changing this would result in the conditional logic scripts to be enqueued on all front end pages regardless of the presence of a front end form.
Wouldn't it be better to (instead of using the constant) look at the presence of conditions (just like is done for enqueueing the validation scripts)?