I have Android Studio 2.1.2, with Instant Run enabled.
Almost the time, Instant Run works and updates my application when I hit Run (or Shift+F10). But sometime, randomly, Instant Run does not work (I'm still running the application, and see the Run button with "lightning icon"), then I have to
Run > Clean and Rerun (Ctrl + F5)
to make it update my application (I see the changes in UI, logs...).
After that, it works then randomly not. I have tried with Android Studio 2.0, 2.1.2 and even the 2.2, always see this issue. I don't know what I did wrong, and how to fix this issue?