Unreal Engine Issues
Unreal Engine Issues
CSM Cached Shadows missing when changing FOV
UE - Rendering - Graphics Features - Shadows - Mar 30, 2026When changing the camera FOV with r.Shadows.CSMCaching enabled, the cached shadows don't appear to be used and shadows are missing. This occurs because the r.Shadow.RadiusThreshold can be low enoug ...
USD Export - crashes when sub level holds level instance
UE - Editor - Content Pipeline - USD - Mar 27, 2026The engine is crashing when the user tries to export from a persistent level with a sub level that contains a level instance. ...
Renamed controls creating duplicate curves in sequencer that once fixed up cause selection issues.
UE - Anim - Rigging - Control Rig - Mar 25, 2026When a control is renamed after it has already been animated in a sequence, the control curve name map needs to be fixed up. Once it is fixed, selecting the control in the world will not map the sel ...
Chooser with Gameplay tag as output causes Evaluate Choose to not compile.
UE - Anim - Gameplay - Mar 20, 2026When using a No Primary Result Chooser that contains an FGameplayTag parameter, an Evaluate Chooser node using that chooser will cause a compilation error: LogBlueprint: Error: [AssetLog][PathToPro ...
When CommonTabListWidgetBase and ScrollBox are arranged vertically, tabs within CommonTabListWidgetBase momentarily become selected when scrolling the ScrollBox upward
UE - Editor - UI Systems - UMG - Mar 19, 2026When attempting to scroll the ScrollBox upward, the cursor briefly shifts focus to another widget (CommonTabListWidgetBase). When logging this behavior using LogSlate VeryVerbose, it can be observed ...
JsonObjectToUStruct removes _ClassName from input FJsonObject, breaking repeated deserialization
UE - Core - Systems - Mar 18, 2026FJsonObjectConverter::JsonObjectToUStruct removes _ClassName from nested JSON objects during deserialization. Removing Obj->RemoveField(ObjectClassNameKey) from ConvertScalarJsonValueToFPropertyWit ...
Modular rig - Hindleg thigh bug when switching from IK to FK
UE - Anim - Rigging - Control Rig - Mar 16, 2026The thigh FK controller of the hingleg in modular rig doesn't move the thigh bone, causing bad deformation on the mesh around character's thigh area. ...
Cursor radius set via FSlateApplication::SetCursorRadius is ignored during FHittestGrid hit testing
UE - Editor - UI Systems - Slate - Mar 16, 2026The cursor radius configured through FSlateApplication::SetCursorRadius() is not respected during Slate hit testing. The radius value is correctly stored in FSlateApplication and passed into FHittes ...
UAbilityTask_SpawnActor::BeginSpawningActor may return true when SpawnedActor contains stale value
UE - Core - Systems - Mar 15, 2026UAbilityTask_SpawnActor::BeginSpawningActor assumes the incoming AActor*& SpawnedActor parameter is nullptr if no actor was spawned, but it does not initialize the parameter at the start of the func ...
NDC Sorting Incorrect
UE - Niagara - Mar 12, 2026Using the new NDC BP nodes in 5.7 causes sorting to break; one system, regardless of world placement, is always drawn over the other. Even when the viewpoint puts the dominant system in the foregrou ...