Nanite enabled Geometry Collection is not simulated by ChaosCache in package application

UE - Simulation - Physics - Feb 19, 2024

When using ChaosCacheManager to simulate destruction of a GeometryCollection, destruction is not simulated when Nanite is ON for the GeometryCollection. In the editor, destruction is simulated rega ...

In Editor, Blueprint resources are not freed up when the Blueprint is closed

UE - Gameplay - Blueprint - Feb 16, 2024

It appears that the preview scene used to render thumbnails is not destroyed after a thumbnail is rendered, even after the blueprint editor is closed and GC is run. Also found in Release-5.4, CL: 31 ...

Components added in Blueprint that want initialisation are not maintained by RerunConstructionScripts

UE - Gameplay - Blueprint - Feb 14, 2024

When a native component that wants initialisation is added to a Blueprint actor in the Blueprint editor, the initialisation state of this component will not be correctly preserved by RerunConstructi ...

Niagara user parameters out of sync between the Sequencer and the Details panel

UE - Niagara - Cinematics - Feb 13, 2024

User Parameters on Niagara actors do not sync in the details panel when animated with Sequencer. Scrubbing in sequencer does not update the details panel. ...

Camera Shot Blend does not work when Reverse Play

UE - Anim - Sequencer - Feb 13, 2024

Camera shot blending on Sequencer does not work when Reverse Play. If we place two cameras in a scene and just blend them by Camera Shot track in sequencer, the view point is interpolated between th ...

Networked Root Motion Sources can experience desynchronisation that is not present in animation root motion under forced adjustment

UE - Gameplay - Feb 13, 2024

In a networked environment with high packet loss (or high forced adjustment factor), motion applied using Root Motion Sources can desynchronise under conditions that animation root motion does not. ...

InterpCurve<T>::FindNearestOnSegment can return NaN or invalid results

UE - Foundation - Core - Feb 12, 2024

We've had two reports on UDN where FInterpCurve<T>::FindNearestOnSegment returns either "NaN for the final value in the DistancesSq array during the first Newton iteration step." The licensee on on ...

ICVFX Editor window blinking and render nodes hitching at the end of every Take Record

UE - Virtual Production - Tools - Multi-user - Feb 10, 2024

After a take record within multi-user has completed recording, and with Toggle Multi User Take Recorder Sync enabled, any other control boxes with the ICVFX window open to UV view will flash with th ...

GPU particles disabled on Quest

UE - Niagara - Feb 9, 2024

GPU particles were disabled on Quest 1 due to a compute issue. We need to validate / fix issues for Quest 2 / Quest 3. Reported in [Link Removed] ...

Node errors that block compilation aren't output in compiler results log

UE - Anim - Rigging - Control Rig - Feb 7, 2024

Errors from EdGraph nodes aren't being piped into the compiler results log.  This can make it difficult to track down what's broken in larger rigs. ...