On Android with Honor 6 grabToImage() takes noise image

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QEventLoop loop;
QSharedPointer<QQuickItemGrabResult> grabResult = itemInQml->grabToImage();
loop.connect(grabResult.data(), SIGNAL(ready()), &loop, SLOT(quit()));
loop.exec();
loop.exit();
QImage qi = grabResult.data()->image();
qi.save("Test.jpg");

On LG G2 / Android 5.1 and Win10 it works correctly. On Honor 6 / Android 6 the result is a randomly noise image, The format shows Format_RGBA8888_Premultiplied.

I created QTBUG-61713.

Has maybe anyone an idea?

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I fixed the problem by updating to Qt 5.9.1