Xcode's Crashes organizer is no longer symbolicating reports for me. It was working fine before, but builds distributed since early June are no longer symbolicating. My guess is that it doesn't actually have to do with 7.3.1, since builds submitted before early June were symbolicating just fine, but some kind of problem on the backend.
Is anybody else seeing the problem or have a workaround to suggest? I have changed nothing in the way I upload builds to TestFlight/App Store.
Actually I've now been using atos as described in this TN if a report doesn't symbolicate: https://developer.apple.com/library/content/technotes/tn2151/_index.html