I’ve found the issue.
This is an inherent behaivor in WordPress. If there is any link with
target="_blank" the WordPress appends noreferrer.
To ignore this, can you please add the below line to Shortcoder\admin\edit.php at line 20 ?
add_action( 'init', 'wp_remove_targeted_link_rel_filters', 99 );
Looks like I don’t have permission for “plugin editor” otherwise I might have added myself.