From 4.21 to 4.23, IPA tripled in size, won't run on iPhone7

Upgrading from UE4.21 to 4.23, everything runs fine on windows but when packaging for iOS, two things (that may or may not be related) are happening:

My IPA size goes from 112mb to 374mb.
It no longer runs on my iPhone7 (gets to the UE screen, then closes the app)

I triple checked that all the build settings are the same, and have googled like crazy but have found no info. What could be going on?