@username shows Fullname

Firstly, compared to another plugin trying to do the same thing, This is the best of all attempts to accomplish this. However on my site the mentions name @username is now showing the full name. As well the last active information is missing (which for us is not really necessary).

I looked in bp-cover.php and found this function:

function core_get_user_displayname_box( $user_id ) {
		return bp_core_get_user_displayname( $user_id );

	$user_info = get_userdata( $user_id );
	return $user_info->user_nicename;
}

but I’ve tried changing user_nicename to user_login but that didn’t work, so your help is greatly appreciated.
I’m using mysitle theme by woothemes since we use WC if that of help.

https://www.ads-software.com/plugins/buddypress-cover-photo/