Appium 1.6.4 driver.Close() exception

Issues/Bugs
1

Selenium Grid, localhost, win 8.1, Android Virtual Device: Nexus 4(4.7, 768x1280, Android 4.4KitKat, API 19)

Appium config.json:

{
“capabilities”:
[
{
“applicationName”: “Browser”,
“browserName”: “Browser”,
“version”:“4.4.2”,
“maxInstances”: 3,
“platform”:“ANDROID”,
“deviceName”:“emulator1”
}
],
“configuration”:
{
“nodeTimeout”:120,
“port”:4728,
“hubPort”:4444,
“proxy”: “org.openqa.grid.selenium.proxy.DefaultRemoteProxy”,
“url”:“http://127.0.0.1:4728/wd/hub”,
“hub”: “127.0.0.1:4444/grid/register”,
“hubHost”:“127.0.0.1”,
“nodePolling”:2000,
“registerCycle”:10000,
“register”:true,
“cleanUpCycle”:2000,
“timeout”:30000,
“maxSession”:1
}
}