Xperia Z3 Compact Received 2 updates for Android 6.0 Marshmallow concept

Yesterday I received 2 updates consecutively for Android 6.0 Marshmallow concept build. The first build was MRA58K.Z1.2058-somc. First I received 2085 (which enabled double-tap to wake), and then I received 2099. The release note stated that this new update fixed a charging bug and some other bug fixes.

There's no sign of Stamina mode (or doze) on this build and I really miss Stamina feature although the battery life is still OK without it. There's a slight improvement on battery life (compared to 5.1.1).