I spoke with the development team and it seems the issue is actually with Safari. The WMD/WFD apps do not actually do any DRM decryption. The DRM is decrypted in Safari. The files are being served to Safari correctly however Safari is not decrypting the DRM and therefore not playing. This issue currently affects all devices in this class. We have reported the issue to Apple and hope an update that will resolve the issue will be released soon. We do not have any timeline for when such an update will be released.
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