I have a weird problem with my .js.map files being unintentionally logged.

In php files I include a header.php file for, well, my header. In my header I include logUserData.php - in which I get the user ip, account info, and log stuff in the database. Basic intention is to track where our users go (not in Analytics, just for our data uses).

Everything works fine, all traffic is logged - but, the .js.map files are tracked. You probably know these aren't listed anywhere in my source. I don't include my logging script in these files, which would be weird anyway.

I have zero purpose to track these files. I don't ever really care if they're called... I can filter them out with the script but that avoids the problem and doesn't fix it.

I have tried moving the include from the header to the footer basically as a shot in the dark. Totally at a loss. I have put the call before and after these scripts, before the html and after.

These are the scripts that have their associated maps called:

<script src="/js/toastr.min.js"></script>
<script src="/js/popper.min.js"></script>
<script src="/js/socket.io.js"></script>

And here are the only relevant parts of the logging script in case it helps, the rest is just user account and db stuff:

$browser = $_SERVER['HTTP_USER_AGENT'];
$ip = $_SERVER['REMOTE_ADDR'];
$CurUrl = $_SERVER['REQUEST_URI'];
$refer = $_SERVER['HTTP_REFERER'];

function get_client_ip() {
    $ipaddress = '';
    if (isset($_SERVER['HTTP_CLIENT_IP']))
        $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
    else if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
        $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
    else if (isset($_SERVER['HTTP_X_FORWARDED']))
        $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
    else if (isset($_SERVER['HTTP_F ORWARDED_FOR']))
        $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
    else if (isset($_SERVER['HTTP_FORWARDED']))
        $ipaddress = $_SERVER['HTTP_FORWARDED'];
    else if (isset($_SERVER['REMOTE_ADDR']))
        $ipaddress = $_SERVER['REMOTE_ADDR'];
    else
        $ipaddress = 'UNKNOWN';
    return $ipaddress;
}

Does anyone have any clue why this might be? I'm totally at a loss.

EDIT: the map files are NOT in my network activity in dev tools and served as application/javascript