Xcode: device using "Connect via network" missing notifications?

My iPad isn't receiving CloudKit notifications as expected when connected to Xcode through "Connect via network" (wirelessly).

My setup: • iPhone - connected to Xcode via USB • iPad 1 - connected to Xcode via USB • iPad 2 - connected to Xcode via "Connected via network"

All three devices are built and running in the debugger. On the iPhone, I change something, the change gets saved to iCloud successfully, and I see the change reflected quickly on iPad 1, but never on iPad 2. Setting breakpoints to detect the remote notifications show they never arrive at all on iPad 2.

Is this a limitation of Bonjour connections, or a bug?