Crash on play if a BP uses a ClearInstances node followed by an AddInstance node

UE - Graphics Features - Jul 21, 2017

Crash on play if a BP manipulates a InstancedStaticMeshComponent by using a ClearInstances node followed by an AddInstance node. This is a blocker for the licensee. This is a regression: Working ...

(Undo Crash in BPs) [CrashReport] UE4Editor_Core!rml::internal::Block::findObjectSize()

UE - Gameplay - Blueprint - Jul 25, 2017

This is a trending crash in the 4.17 Preview. There was one occurrence of this callstack months ago in 4.15.1, but a number of recent ones in 4.17. User DescriptionsI was pressing cltr+z severl ti ...

Sequence Thumbnail appear incorrect when containing Tracks with Spawned Actors

UE - Anim - Sequencer - Jul 25, 2017

Sequence Thumbnails appear incorrect when containing Tracks with Spawned Actors. The actors do not always appear in the same position in the thumbnail as they do when opening the sequence. ...

Event Possessed fires twice

UE - Gameplay - Blueprint - Jul 31, 2017

Event Possessed fires twice even if unpossessed is not called ...

DeterminesOutputType metadata does not work for soft reference types (TAssetPtr / TAssetSubclassOf)

UE - Gameplay - Blueprint Compiler - Aug 2, 2017

It looks like FDynamicOutputHelper::IsTypePickerPin and FDynamicOutputHelper::GetTypePickerPin need to be updated to support soft references. ...

CheckLightmapUVs Not Registering Overlapping Lightmap UVs

Tools - Aug 4, 2017

CheckLightMapUVs is not registering overlapping Lightmap UVs when it is called. User Quote: "I have been working on an editor tool to diagnose some general asset problems and I noticed that in USt ...

r.MipMapLODBias has no effect on Texture Sample using Shared:Wrap or Shared:Clamp

UE - Graphics Features - Aug 11, 2017

If a material contains a Texture Sample node with Sampler Source set to Shared:Wrap or Shared:Clamp, setting r.MipMapLODBias will have no effect on the blurriness of the material. Regression: No - ...

Function output nodes containing an array will cause packaging to fail when nativizing blueprints

UE - Gameplay - Blueprint - Aug 14, 2017

If a blueprint contains a function with an array output and the project is being nativized, the package will fail with an error similar to "error C2679: binary '=': no operator found which takes a r ...

Event tick not firing when in an actor component that is added to an actor

UE - Gameplay - Blueprint - Aug 22, 2017

When using actor components, if you delete a node, such as event tick and then add it to an actor, even if you modify the component again, such as adding the event tick event back, the component wil ...

VS fails to compile when USTRUCT is referenced as BlueprintReadWrite or BlueprintReadOnly

UE - Foundation - Cpp Tools - UnrealHeaderTool - Aug 22, 2017

Defining a FBoneReference variable as BlueprintReadWrite or BlueprintReadOnly in the UPROPERTY macro fails to compile in 4.17. The error message provided by VS states: LogCompile: Error: Type 'FT ...