The ACA (AMPLIFY Crash Analytics) module, if included, was intended to be loaded on app startup before requiring/importing any other JS file on app startup. This way, if a crash occurs in any of the operations that happen before the "app.js" gets loaded, it will be handled by the ACA module. This is no longer happening as of Titanium 8.1.0.
When you do a build of the SDK, you can see the babel transpiled/polyfilled result in the following directories. Here you can see the actual load order.