Probably worth telling the authors that. It is not a problem but is inelegant.

Try - for the sake of testing - changing that word TRUE at the the end to FALSE...

I've tried to change a few things in the child's theme functions.php but it always crashes the site (php is not my thing). I'll keep looking on how to do it

So what happened when you changed that to FALSE?
And - by the way - you should probably clear your browser cache after changes and before a test

I mean I can't get the functions.php to work 🙁

Something like this should work, isn't it?

<?php

function wf_register_scripts() {

.... code in here...
}

?>

Yes - but I do not know, of course, what you are trying to do.

And - I would still like to know what happened upon changing the last parameter to false. That should have switched the load order...

I wanted to declare the same function as in the parent functions.php to change what you said, but it crashes.

The parent looks like this:

function wf_register_scripts() {
...
wp_enqueue_script('bootstap', get_template_directory_uri().'/assets/js/bootstrap.js', 'jquery', '1.0', TRUE);
...
}

add_action( 'wp_enqueue_scripts', 'wf_register_scripts' );

Maybe I need to remove the action and replace it with another one? 

Looks like I made it work doing this:

function remove_my_parent_theme_function() {
remove_action('wp_enqueue_scripts', 'wf_register_scripts');
}
add_action('wp_loaded', 'remove_my_parent_theme_function');

function my_wf_register_scripts() {
...
wp_enqueue_script('bootstrap', get_template_directory_uri().'/assets/js/bootstrap.js', 'jquery', '1.0', FALSE);
...
}
add_action('wp_enqueue_scripts', 'my_wf_register_scripts');

How does it look?

I don't understand why you are going to all that trouble. I was just suggesting you change the original temporarily to see if that resolved the issue. If it does then the decision can be made on how to tackle it...

You're right 😉

and did it work?