4.15 C++ Transition Guide

Err we got crashed from IOnlineSubsystem in 4.15.

Whenever we call the new CreateSession() with the the FUniqueNetId, the engine crash. It said the array is out of bound.
CreateSession() with the old int32 HostingPlayerNum also produce the same error and crash the engine.

We follow everything by the book closely and didn’t have any problem with old versions.

Anyone has any clue to this?

Best,