I've seen some odd behavior with iMessage in iOS 10 where sometimes messages wouldn't go to all my devices and sometimes it would. If I have iMessage open on multiple devices I see messages coming in, but frequently I wouldn't get notified at all. I think I figured out what's going on. It looks like iMessage will only send push alerts to a device that's being used. For example, if my iPad screen is locked, but my iPhone is not, the iMessage alert will only display on my iPhone. The reverse is also true. If the screen on both devices are locked, it will go to both. If both devices are in use, it seems to randomly pick one. Is anyone else seeing this behavior? Is it normal (like Hey Siri only picking one device) or a bug?