Source changes not taken into account by subsequent 'ionic run --device android '

Changes made to source files are not taken into account by subsequent runs.
If I change the content of a console.log message, then running the app with ‘ionic run --device android’, the previous content is still dispaying in the console. When I inspect the code with devTool, I still see the previous version of my console message in the ‘app.bundle.js’ file. I have to quit and restart everything to finally see the changes taken into account.

My ionic info:

Your system information:

Cordova CLI: 5.4.1
Gulp version: CLI version 3.9.0
Gulp local: Local version 3.9.0
Ionic Version: 2.0.0-alpha.42
Ionic CLI Version: 2.0.0-beta.12
Ionic App Lib Version: 2.0.0-beta.6
ios-deploy version: 1.8.3
ios-sim version: 5.0.4
OS: Mac OS X El Capitan
Node Version: v5.1.0
Xcode version: Xcode 7.2 Build version 7C68

Thanks helping me
Sebastien

One more thing:
When I use ‘ionic run --device android -csl’, saving changes in the editor do entail the automatic restart of the run but the changes are not taken into account.