HTC One Android 4.3 Sense 5.5 Widget Background Shape

Question

since Android 4.3 Update with Sense 5.5 for HTC One I'm experiencing some stange behaviour with my homescreen widgets but ONLY on this device. They have a Background-Shape-Drawable like this:

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <stroke
        android:width="2dp"
        android:color="#CCFFFFFF" />

    <gradient
        android:angle="225"
        android:endColor="#99346b9f"
        android:startColor="#55346b9f" />

    <corners
        android:bottomLeftRadius="17dp"
        android:bottomRightRadius="17dp"
        android:topLeftRadius="17dp"
        android:topRightRadius="17dp" />

</shape>

Sometimes the background is displayed correctly, but often the background becomes white instead of transparent-blue. I haven't found any Open-GL error Logs or something else that could explain this error. So I tried to work with the background drawable. And now I think I have found a solution, I need more testing to verify this but I will spread this cause I haven't found any other help for that. The only thing I have changed is to combine the four corner attributes to the android:radius attribut. Take a look:

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <stroke
        android:width="2dp"
        android:color="#CCFFFFFF" />

    <gradient
        android:angle="135"
        android:endColor="#884d8bc3"
        android:startColor="#881d3449" />

    <corners
        android:radius="17dp" />

</shape>

So this seams to help, but I don't know why cause:

android:radius Dimension. The radius for all corners, as a dimension value or dimension resource. This is overridden for each corner by the following attributes.

http://developer.android.com/guide/topics/resources/drawable-resource.html#Shape

It should be equivalent. But on HTC One it isn't.