Delta struct serialized fast arrays replicating new elements with no changelist

UE - Networking - Jun 14, 2021

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

FFastArraySerializer property not replicated when using ForceNetUpdate on dormant actor

UE - Networking - Jun 11, 2021

See the linked UDN for more information. It also seems as though calling ForceNetUpdate before making the changes to the fast array results in the changes being properly replicated. ...

ChildActor is being set to null on client via replication

UE - Networking - Feb 25, 2021

When DuplicateWorldForPIE is called and serializes the references in another AlwaysLoaded sublevel, the properties of a ChildActorComponent are confusingly inaccurate. ...

Replication issues & warnings if a client hitches while the server seamless travels

UE - Networking - Jul 28, 2020

If a client hitches while a server performs a seamless travel, the client will get multiple lines of logspam of these warnings:Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/ ...

Replication issue with actors not being attached to sockets

UE - Networking - Jul 20, 2020

If the client received AttachSocketName before AttachParent, USceneComponent::AttachToComponent will be called while AttachParent may be null, resulting in the received socket name being lost. When ...

Package Map may clear out references to GUIDs on clients but not servers

UE - Networking - Jul 13, 2020

Upon Seamless Travel, the Package Map will attempt to clear out "old" entries in the Guid Cache by marking them with a timeout. The only entries that will actually be marked for a timeout are entrie ...

Calling GEngine->Browse from an RPC implementation causes a crash

UE - Networking - Nov 5, 2019

The engine is not resilient to calling Browse from within an RPC implementation, and likely not resilient to other ways of destroying the net driver within RPCs/OnReps. It's not something we need to ...

Child Actors do not replicate to clients when running project with "-game" command

UE - Networking - Aug 7, 2018

Child Actors do not replicated properly to clients when running a project using the "-game" commandline argument. This does functionality does work properly in PIE and in a cooked build however. Re ...