Crash when Deploying to iPad Air with BC4 Texture Compression Setting

App/project crashes when setting a texture's compression settings to BC4 and deploying to the iPad Air.

As the user in the op states on AnswerHub, the problem seems to lie with specific texture compression of BC4, as if you change it to the default, it packages and opens just fine.

Regression?
Yes, running the same test on 4.11 the project deploys and opens as expected.

1. Download and Open attached project.
2. Launch to iOS Device (I used iPad Air to match users report).

Outcome App crashes/closes on device after splash screen appears.

Expected App loads and no crash occurs.

BC4 causes crash on Metal