Which is the previous Meteor version you were on?
We had issues on upgrading to Meteor 2.14 onwards, but was related on splash screen on Android, not iOS, Anyone got Android and iOS launchScreens to work in 2.14 - #12 by matheusccastro
Could you also provide us the cordova-plugins you use? Also, if possible a minimal reproduction repository where we can get straight same behavior as you do.
Be sure you also clean .meteor/local just in case is the cache acting, as well as uninstalling the previous build on the emulator, if exists.
Could you also try this?