Unreal Engine 4.12.5 crashes on packaging game after building lighting?

I’m having an issue where after building lighting, Unreal will crash if I try to package or run “standalone game.” After opening the project and before building lighting for a level, packaging and standalone game preview works fine, but either of these will immediately crash Unreal if lighting has been built for any level. Play in editor, however, works fine.

I managed to get the around the issue by upgrading to 4.14! Unfortunately, I’m still not sure what was causing the engine to crash.