Shmoo on "wp_print_media_templates function problem"

Since WordPress 4.1.0 the wp_print_media_templates() function doesn't work anymore if you first remove the action and later add the same function again, only with a different name. ( for testing )

remove_action( 'admin_footer', 'wp_print_media_templates' );
add_action( 'admin_footer', 'my_print_media_templates' );

function my_print_media_templates() {

...... 100% the same code as original for testing .....

}

Looks like it breaks the Javascripts or something because there is no drop down functionality inside the backend, also the screen options panel at the top doesn't work anymore.