Vaadin TestBench Grid RemoteDriver NullPointerException

Hi all,
I have a TestBench project. when i run my test case with ChromeDriver (local driver) everthing is ok. But when to use hub and node with remotedriver, same case throws exception below

Caused by: java.lang.NullPointerException
at org.openqa.selenium.remote.server.handler.GetElementDisplayed.call(GetElementDisplayed.java:32)
at org.openqa.selenium.remote.server.handler.GetElementDisplayed.call(GetElementDisplayed.java:23)
at java.util.concurrent.FutureTask.run(Unknown Source)
at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:176)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Thansk for helps…