PhpStorm Inspection Claim Variable is Unused when it is Used

unused-in-foo.php

<?php

function get_foo( $state, $method ) {

	$value = null;

	if ( method_exists( $this, $method ) ) {

		/**
		 * PhpStorm INCORRECTLY identifies $value as NOT being used later.
		 */
		$value = $state->data[ $method ] = call_user_func( array( $state, $property_name ) );

	}

	return $value;

}

/**
 * @param object $state
 * @param string $method
 *
 * @return mixed|null
 */
function get_bar( $state, $method ) {

	$value = null;

	if ( method_exists( $this, $method ) ) {

		/**
		 * PhpStorm correctly identifies $value as being used later.
		 */
		$value = $state->data = call_user_func( array( $state, $property_name ) );

	}

	return $value;

}