Unable to package additional maps in 5.3

Can’t wrap my head around it. The platform is Android.
Any map I choose as the “Game Default Map” gets packaged and runs fine, but opening any other map always ends in a crash.
The maps have references to each other, traceable with the reference viewer.
The maps are added to Project Settings → Packaging → List of maps to include in a packaged build.
The maps are present in the DefaultGame.ini as +MapsToCook.

The output log doesn’t report anything wrong, the Android run logs stop before crashing.
It’s not a travel error, the built APK is way too small to include the additional maps.

Any input would be appreciated.