The device ‘blah blah’ has always been there, so that is a red herring. The UTC time is also correct. We now convert everything to UTC time to do the checks, so the current local time and the certificate times are all UTC before we do any check (the ones in the certificate and the provision are already UTC, we had a bug previously where we were checking local times against UTC times, that’s the current change). I’m looking to see if I can figure out what this is now, but the logs all look good except for the final push to the device. Have you tried any of this on a Mac?
Also, the ipa is just a zip file, so you should be able to unzip it to a directory and then you can verify the embedded.mobileprovision is the same as the one picked (it can be loaded into a text editor and checked for the correct id). Also, you can then see if there is a Payload/UE4Game.app/_CodeSignature directory. If that is missing, that would be a big problem.
-Pete