Unreal Engine Issues
Unreal Engine Issues
FFastArraySerializer::DeltaFlags may be saved to blueprint CDO, causing delta struct serialization to be skipped
UE - Networking - Mar 28, 2025When an actor's replicator is first created and initialized, FObjectReplicator::InitWithObject will use the archetype as the source object for copying the properties. From there, the custom delta pr ...
ChaosCacheManager is not recording the Observed GeometryCollections NotifyBreak states between level loading and will default to false if changed from Record to Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not recording the Observed GeometryCollections (GC) NotifyBreak states between level loading and will default to false if changed from Record to Play. AChaosCacheManager ...
ChaosCacheManager is not reproducing Collision Events the second time you Record and Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Collision events the second time (and onwards) we record a Geometry Collection (GC) breaking session. Particles set to track Collision Events correctly fol ...
ChaosCacheManager is not reproducing Trailing Events
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Trailing Events. Particles set to track Trailing Events correctly follow the position of the trailing event when the Geometry Collection (GC) is physically ...
Branching Points in a Montage Affect the Rotation Outcome of Root Motion
UE - Anim - Runtime - Mar 28, 2025When playing Montages with Root Motion, the sub stepper extracts root motion transform in small increments. If a Branching Point exists within the interval being extracted, the extraction range is s ...
Stalled cook due to PoseSearchDatabase DDC storage/retreival
UE - Anim - Gameplay - Mar 27, 2025reported via UDN: [Link Removed] ...
Material Layers Relink Button Missing
UE - Rendering Architecture - Materials - Mar 26, 2025The Relink button is missing (as are the Save Sibling and Save Child buttons) on Material Instances that use Material Attributes Layers in 5.5. ...
Distance Field AO from Moveable Skylight (non-Lumen) invalidates AO incorrectly with a screenspace offset to the right of moving objects
UE - Graphics Features - Mar 25, 2025When Global Illumination is set to “None” in the project settings the ambient occlusion does not correctly render shadows for moving objects. This has been observed in versions 5.4 and above. ...
Follower mesh components don't inherit the lead component's recently rendered flag
UE - Anim - Runtime - Mar 25, 2025Follower mesh components have their recently rendered flag set in their TickComponent method. This means that if a user turns tick off on a follower component, the recently rendered flag isn't upda ...
Crash when exposing a TOptional<FName> or TOptional<FText> to the editor through a UProperty.
UE - Editor - Workflow Systems - Mar 25, 2025Support for editor-exposed uproperties of type TOptional<T> has been added by CL 28199740 on september 2023. However, since then until today in UE 5.5, a crash can happen when exposing TOptional<FNa ...