Unreal Engine Issues
Unreal Engine Issues
USceneComponent::AttachToComponent may not be called on client depending on replication order
UE - Networking - Jan 13, 2026If the component being attached is received first, OnRep_AttachParent will set bNetUpdateAttachment to true, so USceneComponent::PostRepNotifies will call AttachToComponent. If the attach parent is ...
HeaderMarkForPacketInfo.GetNumBits() == 0 when closing NetConnection during Tick
UE - Networking - May 12, 2021Licensee reported getting this error on PS4 after losing internet connection or putting the console into rest mode. See linked UDN for callstack. The NetConnection calls Close during its Tick, due ...
Multicast RPC from PlayerController with RepGraph results in an invalid swap message
UE - Networking - Mar 4, 2021Since a player controller only exists on the server and on the owning client, calling a multicast from one isn't really a supported operation. However, this case is still handled cleanly when RepGra ...
Dynamic Spatial Frequency not working with dependent actors
UE - Networking - Feb 25, 2021In UReplicationGraphNode_DynamicSpatialFrequency::CalcFrequencyForActor, the ActorChannelCloseFrameNum is updated for the actor but not its dependents when calculating FramesTillReplicate. As a resu ...
ChildActor is being set to null on client via replication
UE - Networking - Feb 25, 2021When DuplicateWorldForPIE is called and serializes the references in another AlwaysLoaded sublevel, the properties of a ChildActorComponent are confusingly inaccurate. ...
MarkComponentsRenderStateDirty not called when bHidden is replicated
UE - Networking - Feb 1, 2021SetActorHiddenInGame will call MarkComponentsRenderStateDirty, but when the new value is replicated to the clients, the render state is not marked dirty when the change is received. ...
Warning in Net.PacketNotify Test
UE - Networking - Jan 27, 2021Warning when running the packet notify test, regarding missed acks. ...
Crash in Network Prediction during PeriodicDamage GameplayEffects Test
UE - Networking - Jan 27, 2021Crash during Periodic Damage test for Gameplay Abilities system in the Network Prediction plugin, when both plugins are enabled. Related to a null GameInstance. ...
Ensure in APlayerState::OnRep_bIsInactive may be hit
UE - Networking - Jan 6, 2021The ensure in APlayerState::OnRep_bIsInactive may be hit due to the player state being replicated before the game state. The check is necessary for making sure the game state is available, but the e ...
Duplicate level collections not being respected by UGameEngine::NetworkRemapPath
UE - Networking - Jan 5, 2021When NetworkRemapPath was refactored in 4.26 to support replay connections via the rep graph, the check for duplicate level id on the driver was lost in the new code path. This causes the demo driv ...