[BUG]localhost multiplayer(split screen) servertravel failed on 4.14/4.15


Cmd: ServerTravel /Game/Maps/GameMap
LogGameMode: ProcessServerTravel: /Game/Maps/GameMap
LogNet: Browse: 127.0.0.1//Game/Maps/GameMap?game=/Script/Engine.GameModeBase
LogNet: World NetDriver shutdown IpNetDriver_1 [GameNetDriver]
LogNet: DestroyNamedNetDriver IpNetDriver_1 [GameNetDriver]
LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: 127.0.0.1:7777, Name: IpConnection_0, Driver: GameNetDriver IpNetDriver_1, IsServer: NO, PC: PlayerController_1, Owner: PlayerController_1, Channels: 11, Time: 2017.02.26-06.04.43
LogNet: UChannel::Close: Sending CloseBunch. ChIndex == 0. Name: [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 127.0.0.1:7777, Name: IpConnection_0, Driver: GameNetDriver IpNetDriver_1, IsServer: NO, PC: PlayerController_1, Owner: PlayerController_1
LogExit: GameNetDriver IpNetDriver_1 shut down
LogInit: WinSock: Socket queue 32768 / 32768
PacketHandlerLog: Loaded PacketHandler component: Engine.EngineHandlerComponentFactory (StatelessConnectHandlerComponent)
LogNet: Game client on port 7777, rate 10000
LogNet: UPendingNetGame::InitNetDriver: Sending hello. [UNetConnection] RemoteAddr: 127.0.0.1:7777, Name: IpConnection_2, Driver: PendingNetDriver IpNetDriver_2, IsServer: NO, PC: NULL, Owner: NULL
LogNet: UChannel::ReceivedSequencedBunch: Bunch.bClose == true. ChIndex == 0. Calling ConditionalCleanUp.
LogNet: UChannel::CleanUp: ChIndex == 0. Closing connection. [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 127.0.0.1:53185, Name: IpConnection_1, Driver: GameNetDriver IpNetDriver_0, IsServer: YES, PC: PlayerController_1, Owner: PlayerController_1
LogNet: UNetConnection::Close: [UNetConnection] RemoteAddr: 127.0.0.1:53185, Name: IpConnection_1, Driver: GameNetDriver IpNetDriver_0, IsServer: YES, PC: PlayerController_1, Owner: PlayerController_1, Channels: 11, Time: 2017.02.26-06.04.43
LogNet: UChannel::Close: Sending CloseBunch. ChIndex == 0. Name: [UChannel] ChIndex: 0, Closing: 0 [UNetConnection] RemoteAddr: 127.0.0.1:53185, Name: IpConnection_1, Driver: GameNetDriver IpNetDriver_0, IsServer: YES, PC: PlayerController_1, Owner: PlayerController_1
LogNet: NotifyAcceptingConnection: Server MainMap refused
LogOnline:Warning: NULL: No game present to leave for session (Game)
LogNet: NotifyAcceptingConnection: Server MainMap refused
LogNet: NotifyAcceptingConnection: Server MainMap refused
LogNet: NotifyAcceptingConnection: Server MainMap refused
LogEngine: Server switch level: /Game/Maps/GameMap
LogNet: Browse: /Game/Maps/GameMap
LogLoad: LoadMap: /Game/Maps/GameMap
LogNet: World NetDriver shutdown IpNetDriver_0 [GameNetDriver]
LogNet: DestroyNamedNetDriver IpNetDriver_0 [GameNetDriver]
LogExit: GameNetDriver IpNetDriver_0 shut down
Cmd: MEM
LogMemory: Platform Memory Stats for Windows
LogMemory: Process Physical Memory: 1074.99 MB used, 1077.41 MB peak
LogMemory: Process Virtual Memory: 1484.86 MB used, 1568.89 MB peak
LogMemory: Physical Memory: 6626.81 MB used,  9728.25 MB free, 16355.07 MB total
LogMemory: Virtual Memory: 2325.08 MB used,  9728.25 MB free, 134217728.00 MB total
Allocator Stats for TBB: (not implemented)
LogAIModule: Creating AISystem for world GameMap
LogLoad: Game class is 'RhythmGameMode_C'
LogWorld: Bringing World /Game/Maps/UEDPIE_1_GameMap.GameMap up for play (max tick rate 0) at 2017.02.26-14.04.47
LogWorld: Bringing up level for play took: 0.007290
LogGameMode: Warning - PATHS NOT DEFINED or NO PLAYERSTART with positive rating
LogBlueprintUserMessages: [RhythmGameMode_C_0] gamemode
LogLoad: Took 0.579072 seconds to LoadMap(/Game/Maps/GameMap)
LogNet:Warning: Incoming ip address doesn't match expected server address: Actual: 0.0.0.0:0 Expected: 127.0.0.1:7777
LogNet:Warning: Incoming ip address doesn't match expected server address: Actual: 0.0.0.0:0 Expected: 127.0.0.1:7777
LogNet:Warning: Incoming ip address doesn't match expected server address: Actual: 0.0.0.0:0 Expected: 127.0.0.1:7777
LogNet:Warning: Incoming ip address doesn't match expected server address: Actual: 0.0.0.0:0 Expected: 127.0.0.1:7777

at file:
Engine\Plugins\Online\OnlineSubsystemUtils\Source\OnlineSubsystemUtils\Private\IpNetDriver.cpp