Unreal Engine Issues
Unreal Engine Issues
Iris - RPCs split into partial blobs aren't received on non-replicated components
UE - Networking - Iris - Aug 5, 2025This issue does not occur if the RPC is not split into partial blobs. The RPC is received on the non-replicated component if Iris is disabled. ...
Iris - Subobjects marked COND_InitialOnly not replicated
UE - Networking - Iris - May 23, 2025When adding replicated subobjects to the registered subobjects list, you can set replication conditions to control how the subobject is considered for replication. Without Iris enabled, a COND_Initi ...
Iris - large fast arrays serialize multiple elements when only one is dirtied
UE - Networking - Iris - Apr 8, 2025This seems to be a result of how the changemask is handled for fast arrays. Because the changemask is a fixed set of bits (defined by IrisFastArrayChangeMaskBits), a single bit can represent multipl ...
Iris - replication errors for actors in runtime data layer when reconnecting
UE - Networking - Iris - Mar 28, 2025It seems like upon reconnecting to the server, the client receives a bunch containing the actor before it has loaded the data layer. See attached log snippet for errors. ...
[Iris] DestroyObjectsPendingDestroy not called on server with no clients
UE - Networking - Iris - Mar 25, 2025In UNetDriver::TickFlush, UReplicationSystem::PreSendUpdate is not called on the server when it does not have any client connections. PreSendUpdate is where DestroyObjectsPendingDestroy is called fr ...
Iris - dynamically spawned actor components call BeginPlay before reading initial replicated properties
UE - Networking - Iris - Feb 27, 2025The same issue reported in [Link Removed] is also present in Iris. ...
Iris - incorrect initial state in pawn's BeginPlay if replicated via huge object path
UE - Networking - Iris - Feb 11, 2025This occurs when the pawn is initially replicated using the huge object path when first connecting to a server. Destroying and restarting the client's pawn works as expected. After connecting, the c ...
Iris - always relevant actors placed in the map do not appear in the debug list
UE - Networking - Iris - Dec 4, 2024This seems to occur regardless of which filter is used and whether bNetLoadOnClient is true or not. ...
Iris - Non-replicated properties of FInstancedStruct reset after replication
UE - Networking - Iris - Nov 8, 2024This issue only occurs with Iris enabled. ...
Iris - Missed subobject destruction can cause incomplete client state
UE - Networking - Iris - Oct 7, 2024From UDN assigned to [Link Removed] ...