are you seeing the error in the admin or on a page that the user might view? typically, i don’t use acf form fields to take input from clients. typically i will use my own form fields and then save them using the fields i’ve created using acf.
for instance, on an auction site that i have, acf is used to show the custom fields on my custom post type. one of the fields on my custom post type called “custom-post-auction-bid” is a field called “auction_cur_bid”. acf displays that current bid value when my admin access the “bid” post.
however, the data is actually written in this way, during form processing:
update_post_meta($post_id, 'auction_cur_bid', $bid);
perhaps rethinking the method of integration will allow you to avoid the conflict altogether, especially since the conflict appears to be related to client side scripting anyway.
