PostReplicatedChange called for fast array item even when no values change

UE - Networking - Jun 7, 2024

Unless a property is set to REPNOTIFY_Always, we compare the property's received value to the current value on the client before calling the OnRep function. However, when determining if a fast array ...

Actors in always loaded sublevels are not immediately recorded into replays

UE - Networking - May 24, 2024

In FReplayHelper::ReplicateActor, we check Connection->ClientHasInitializedLevel(Actor->GetLevel()) to see if the actor should create a channel or not. However, the DemoNetConnection does not have a ...

Replication errors when connecting Shipping build to Test/Development build

UE - Networking - May 14, 2024

See linked UDN for more info. This issue was reported for Iris, but I believe package map errors occur in the current replication system as well. ...

Crash when seamlessly travelling from World Partition map

UE - Networking - May 9, 2024

Based on the licensee's report, the crash seems to be occurring due to the WorldDataLayers actor, and setting this actor to never be dormant seems to resolve the issue. ...

Investigate crash with replication nested ever changing attachments

UE - Networking - May 7, 2024

There seems to be an issue with replicated attachments ending up causing cyclical setups resulting in crash on clients. It was reported for 5.2 but even after patching up code it seems to occur. ...

UpdateDelayRandomStream can cause replicated actor to be skipped for consideration

UE - Networking - May 6, 2024

When calculating an actor's NextUpdate time, a random delay is added: ActorInfo->NextUpdateTime = World->TimeSeconds + UpdateDelayRandomStream.FRand() * ServerTickTime + NextUpdateDelta; If this d ...

Package Map warnings when spawning primary asset class on server after seamless travel

UE - Networking - Apr 18, 2024

This issue seems to occur due to the client keeping the NetGUID for the class/object, while the server will clean up this NetGUID during travel. When the client sends the class and its NetGUID as pa ...

Incorrect relative position on replicated child actor

UE - Networking - Apr 4, 2024

The issue seems to occur when a replicated child actor is received on the client before its parent. The child actor will first be spawned at its correct global position, with its root component's p ...

In-Memory replay checkpoints incorrectly deleted when stream length is less than TimeBufferHintSeconds

UE - Networking - Mar 18, 2024

The buffer start time is calculated by subtracting the TimeBufferHintSeconds from the stream length: const uint32 BufferStartTimeMS = UE::LWC::FloatToIntCastChecked<uint32>(FoundReplay->StreamInfo.L ...

MustBeMappedGUID errors after several seamless travels

UE - Networking - Feb 19, 2024

This seems to be the same issue as was reported in [Link Removed], as enabling net.ResetAckStatePostSeamlessTravel resolves the issue. However, it was recently reported that disabling net.FilterGuid ...