GameplayTagQuery AutoDescription not refreshed after GameplayTag redirect on load

UE - Gameplay - Gameplay Tags - Jan 21, 2026

FGameplayTagQuery does not refresh its cached AutoDescription after GameplayTag redirects are applied during asset load. As a result, after renaming a GameplayTag and restarting the editor, the Game ...

Multicast RPCs may be sent to clients in a different level with Replication Graph

UE - Networking - Jan 20, 2026

UReplicationGraph::ProcessRemoteFunction does not check if the client has the same loaded world as the server when sending a multicast RPCs. For actors that are persisted partway through a seamless ...

Character unnecessary step down during PHYS_Flying mode

UE - Gameplay - Player Movement - Jan 15, 2026

When MovementMode is set to PHYS_Flying, the character may unexpectedly step down by MaxStepHeight when colliding with a wall near a ceiling. This occurs because UCharacterMovementComponent::StepUp ...

Curve Retargeting does not work with SourcePose retarget mode

UE - Anim - Rigging - Retargeting - Jan 14, 2026

Currently we build what source curves we are going to remap is done inside of: FIKRetargetCurveRemapOp::AnimGraphPreUpdateMainThread But in our ikretarget processor code we skip calling that functi ...

Detaching a component with "KeepRelative" location rule can result in incorrect location on client

UE - Networking - Jan 13, 2026

When receiving a replicated detachment, USceneComponent::PostRepNotifies will call DetachFromComponent with the KeepWorldTransform detachment rule. If the component is detached on the server with th ...

USceneComponent::AttachToComponent may not be called on client depending on replication order

UE - Networking - Jan 13, 2026

If 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 ...

Inconsistent Behavior in TextureLODGroups when setting NumStreamedMips=0

UE - Rendering - Architecture - Jan 8, 2026

A licensee has reported that it is not possible to disable texture streaming of a given TextureLODGroup by setting "NumStreamedMips=0" in their device profiles. Currently, using 0 results in the sam ...

Global Weight of Slot Node is incorrect when fetched after using a Pose Cache

UE - Runtime - Anim BP - Jan 7, 2026

When a montage slot node output is pushed to a Pose Cache and used in a Two-Way Blend, the value returned by GetSlotNodeGlobalWeight will be the current fractional value rather than the actual globa ...

FViewElementPDI::DrawLine calls for SDPG_World are not rendered in PIE or in Game

UE - Rendering - Architecture - RHI - Jan 7, 2026

When View.Family->EngineShowFlags.CompositeEditorPrimitives is false in the function RenderEditorPrimitivesForDPG. This code picks which version of the batched lines to renderconst FBatchedElements ...