Scripts not loading properly when using wp_enqueue_script in custom WordPress theme

I am developing a custom WordPress theme and trying to load JavaScript files using wp_enqueue_script, but the script is either not loading or not working as expected.

Here is the code I am using in functions.php:

function my_theme_scripts() { wp_enqueue_script( 'custom-script', get_template_directory_uri() . '/assets/js/custom.js', array('jquery'), '1.0', true ); } add_action('wp_enqueue_scripts', 'my_theme_scripts');

Problem:
The script does not seem to execute in the browser. When I inspect the page, sometimes the file is not loaded, or it loads but the functionality does not work.

What I have tried:
1. Checked file path and confirmed the JS file exists
2. Cleared browser cache
3. Verified no console errors
4. Tried changing dependency (removed 'jquery')

Expected result:
The script should load in the footer and execute properly.

Actual result:
The script either does not load or does not execute.

Can someone explain what might be causing this issue or what I might be missing?