Hi @thunkmark - thanks for bringing this to our attention. We currently do not add an extension to the cached JS bundle files on Android. I’ve added a ticket to track this on GH: https://github.com/expo/expo/issues/2558 but cannot promise that we will get to it on any given timeline.
In the meantime, you can try forking the expo/expo repo and adding this yourself. The relevant code is here: https://github.com/expo/expo/blob/3748c52a84875dee9c5e746ecfe8f2b0b61579b6/android/expoview/src/main/java/host/exp/expoview/Exponent.java#L361
Hope this helps! Sorry we don’t have a better answer for you 