assign Long to variable cast it to Integer

A DESCRIPTION OF THE PROBLEM :
reproduce bug code:
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Main {
    public static void main(String[] args) {
        ScriptEngineManager factory = new ScriptEngineManager();
        ScriptEngine engine = factory.getEngineByName("nashorn");
        try {
            String script = "var Long = Java.type('java.lang.Long');" +
                    "var id = Long.valueOf('1');" +
                    "print(Long.valueOf('1').equals(id));" +
                    "print(Long.valueOf('1').getClass());" +
                    "print(id.getClass());";
            engine.eval(script);
        } catch (ScriptException se) {
            se.printStackTrace();
        }
    }
}

JDK 11 Output:
false
class java.lang.Long
class java.lang.Integer

JDK 8 Output:
true
class java.lang.Long
class java.lang.Long

REGRESSION : Last worked in version 8u361


FREQUENCY : always