Well, Google already is working on new built from scratch emulator, so it might be some problem with exisitng ones
I recommend you nowadays, as you have upgraded your Android Studio to 2.0 version use temporary Genymotion emulator: https://www.genymotion.com
It uses HAXM, it's much faster than Google's default emulator, and has some useful features like faking GPS localization.
Give it a try. I'm already using it and that's why I am highly recommend you this.
Sorry, that I haven't respond clearly to your question, but it seems to be an Android problem, and you should to downgrade it to previous one.
To avoid that, please try to use Genymotion emulator.