Sprites from ETC2 atlases are drawn incorrectly when they are sharing a Packing Tag with other sprites using ETC1 split alpha channel

1. import multiple images
2. assign the images to the same Packing Tag
3. set some of the images to use Override for Android -> Compress using ETC1 (split alpha channel)
4. move some non-ETC1 sprites into the scene and play

The sprites' is drawn incorrectly (mesh is drawn even for transparent areas).