bbPress.org

I guess you can try this code instead to see if it works any. I guess I can can also just check out to see if the custom script file name changed. I am using an older version of Divi 2.4 for testing so it could be a possibility.

You can contact me here if you want me to check it out on your site later.
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add_action( 'wp_print_scripts', 'rkk_reply_threading_divi' );

function rkk_reply_threading_divi() {

    if( is_bbpress() && bbp_is_single_topic() ) {
        wp_dequeue_script( 'divi-custom-script' );
    }
}