Unreal Engine Issues
Unreal Engine Issues
Client may receive failure message before ClientTravel RPC during non-seamless travel
UE - Networking - Aug 9, 2022See linked UDN for more info. When a server initiates a non-seamless travel, it will inform any connected clients by sending the reliable ClientTravelInternal RPC. After a delay (controlled by Serve ...
Changes to AActor::SetReplicates caused Role/RemoteRole replication fix to regress
UE - Networking - Jul 14, 2022There was a recent bug report that matched the description of some older cases (see linked UDN). The issue raised in those cases, [Link Removed], had been fixed, but the recent question seemed to in ...
Ensure hit in OutdatedKnownStaticMeshDetected for replicated StaticMeshComponent
UE - Networking - Jun 10, 2022The component's KnownStaticMesh value is updated whenever UStaticMeshComponent::UpdateBounds is called, and AActor::OnRep_ReplicatedMovement can result in this being called for the component. If thi ...
Push based, COND_InitialOnly property can fail to be replicated when actor becomes relevant again
UE - Networking - Jun 9, 2022COND_InitialOnly properties can be resent when an actor becomes relevant to a client again. However, if the property is push based and it was never replicated the first time the actor was created on ...
Replicated subobject won't be recorded in replay checkpoints if it has no replicated properties
UE - Networking - Jun 8, 2022Because the subobject's RepLayout is empty, it won't write anything to the bunch when recording a replay checkpoint. This means that when scrubbing to a time past a checkpoint, the destroyed subobje ...
Pawn's role is incorrect in BeginPlay on client if a multicast RPC is called in BeginPlay on server
UE - Networking - Jun 6, 2022It seems as though calling a multicast RPC during BeginPlay on the server will cause the new actor to finish spawning on the client before applying any initial replicated data, such as the actor's R ...
DemoNetDriver can cause ClearVoicePackets to be called multiple times in one tick
UE - Networking - May 18, 2022Because DemoNetDriver doesn't override PostTickFlush, it will call the base UNetDriver's PostTickFlush. When both the game NetDriver and DemoNetDriver are ticked, this results in the online interfac ...
Client is unable to Server Travel with the host when Seamless Travel is disabled
UE - Networking - May 5, 2022Client is unable to Server Travel with the host when Seamless Travel is disabled. Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 and the client is able to join in, it is a regress ...
Replicated Child Actor in standalone editor instance causes package map errors
UE - Networking - Apr 25, 2022This only seems to occur if the parent is statically placed, and only when launching the instances as standalone game from the editor. If the actor is dynamically spawned or if the instances are run ...
Replicated Timelines Update runs once for Clients when you change its Play Rate
UE - Networking - Apr 22, 2022See linked UDN for more info. This looks to be because of how OnRep_Timeline handles any changes to the component's FTimeline struct. If the timeline isn't playing, OnRep_Timeline will call SetPlayb ...