See linked UDN for more information.
Set up some sort of notification for when the pawn's Controller Changed event is received.
In PIE, enable Network Emulation, and use the "Bad" emulation profile with increased packet loss. Then start a server and client instances.
Expected: The controller changed event would occur on both the server and client.
Actual: Sometimes this event is not received on the client.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-149757 in the post.