Instant Run - It keeps saying a class has been added when there is none

Question

I've updated my Android Studio setup to 2.0-beta2 release in order to have a taste on the new Instant Run feature.

I've followed all instructions available including updating Gradle plugin to 2.0.0-beta2 and such but alas, I still can't get IR to run.

That message appears all the time I want to run my app using IR. The main caveat here that I did not add any new class to my code base; not even one. All I did before running that build was changing 2 lines within one of my custom View class from this:

    subView1.setVisibility(View.GONE);
    subView2.setVisibility(View.GONE);

..to this:

    subView1.setVisibility(View.VISIBLE);
    subView2.setVisibility(View.VISIBLE);

Despite that fact I still can't get IR to run.

Any clues on what's happening here?