Unreal Engine Issues

Iris - Non-replicated properties of FInstancedStruct reset after replication

This issue only occurs with Iris enabled. ...

Iris - Missed subobject destruction can cause incomplete client state

From UDN assigned to [Link Removed]  ...

Iris - Ensure in MarkObjectDirty when calling multicast from component owned by bOnlyRelevantToOwner actor

It seems as though the component is in scope for more than one connection, despite its owner only being relevant to one. Enabling Net.Iris.Filtering.ValidateNobSubObjectInScopeWithFilteredOutRootObj ...

Iris - Fast Array ItemMap is empty in PostReplicatedAdd

With Iris enabled, the ItemMap is populated correctly only on the next frame, but it is empty during the callback. This differs from the behavior of the current system, where the ItemMap is populat ...

Compilation errors with UE_NET_ENABLE_REPLICATIONREADER_LOG enabled

Enabling UE_NET_ENABLE_REPLICATIONREADER_LOG results in the following errors: {{4>[1/5] Compile [x64] ReplicationReader.cpp 4>D:\P4V\UE5-Main\Engine\Source\Runtime\Experimental\Iris\Core\Private\Ir ...

Iris - high latency causes initial hitch for newly spawned actor's movement

This may possibly be due to FReplicationWriter::CanSendObject waiting for CreateConfirmation. ...

Iris - Destruction of initially dormant actor not replicated to clients

Without Iris enabled, UNetDriver::NotifyActorDestroyed will handle creating destruction info for dormant actors, including any initially dormant, statically placed actors. However, this path seems t ...

checkSlow hit when using array with replication condition in Iris

For arrays, FPropertyReplicationStateDescriptorBuilder::IsSupportedProperty will set the FMemberProperty's ChangeMaskBits to "1U + FPropertyReplicationState::TArrayElementChangeMaskBits". If the arr ...

Iris - Function descriptors will prevent protocols from being marked as fully push based

Iris - check hit in FNetBitStreamWriter::InitBytes if object has only COND_InitialOnly replicated properties

InitOnly FReplicationStateDescriptors will have a value of 0 for ChangeMaskBitCount, so if an object only has COND_InitialOnly properties, its FReplicationProtocol will also have a ChangeMaskBitCoun ...