I know we already worked on the back button behavior, but it doesn't feel right.

Can the back button never trigger "browser back button" but just do the expected android behavior? Which would be to go to the previous app / dashboard.

At worst I think it's better to make the back button inactif than quitting the app. When the back button quits the app, the app needs to be restarted and the user lose android multitasking benefit.