! is_admin() is triggered on dashboard page

I recently updated to latest version of WooCommerce 3.5.7 and whenever I use the function ! is_admin() on admin init. it is still triggered on backend. It doesn’t happen on old version like 3.4.5

Sample code below. The update_option is still triggered when I’m in the dashboard, whereas it should only be triggered on front-end.

add_action( 'init', 'theme_sample_init' );

function theme_sample_init() {
	$test_value = get_option( 'test_value' );
	var_dump( $test_value );
	if( ! is_admin() ) {
		update_option( 'test_value', 'dashboard is triggered' );
	}
}