Stu Maschwitz on Lightroom for iPhone:
But the biggest flaw represents a fundamental misunderstanding of mobile photography. Lightroom mobile strips important metadata from your photos, including time/date and location. That’s right, Lightroom mobile kills one of your iPhone’s best camera features—the always-on GPS.
That sucks, I had no idea that happened. Seems like a bug/oversight to me so hopefully it is quickly corrected.