Fails to take screenshot on android device

[Bcr12]

Running tests on an Android device the screenshot fails, taking a screenshot using browser.driver.takeScreenshot() works but calling vr.takeScreenshot() causes unknown error.

Error: Failed: unknown error: operation is unsupported on Android

It looks like this is the problem:

function _getProperties (browser) {
return browser.getCapabilities()
.then(_propertiesFn)
.then(function (properties) {
return browser.manage().window().getSize().then(function (size) {
properties.resolution = size.width + 'x' + size.height;
return properties;
});
});
}

Returning properties outside browser.manage().window().getSize() seems to work.

function _getProperties (browser) {
return browser.getCapabilities()
.then(_propertiesFn)
.then(function (properties) {
//return browser.manage().window().getSize().then(function (size) {
//properties.resolution = size.width + 'x' + size.height;
//return properties;
//});
return properties;
});
}

Will not setting the resolution cause problems?