Opening Editor preferences window while simulating and pressing Play/Stop causes memory leak

Gameplay - Input - Feb 3, 2020

An open but minimized Editor Preferences window causes a memory leak while simulating and repeatedly pressing Play/Stop. ...

Planar Reflection Actor does not pivot at center when using ALT+LMB Drag in Viewport

Rendering - Jan 31, 2020

When moving a Planar Reflection Actor's transform location to (X:5000, Y:5000, Z:0)  The Planar Reflection Actor does not pivot at center when using ALT+LMB Drag in the viewport.   Note: Moving tra ...

BP - Nativizing a UMG widget hierarchy in which a child widget of another widget BP type has the "Is Variable" box unchecked will result in a crash at runtime.

Gameplay - Blueprint - Jan 28, 2020

When the "Is Variable" box is unchecked for a BP-typed child widget, a variable will not be created at Blueprint compile time to reference the child widget in the nativized widget BP class. This bre ...

Default pose is displayed in the first frame when playing with Sequencer

Tools - Sequencer - Jan 28, 2020

The problem is that the camera is evaluated when the sequencer is played, but the animation does not seem to play properly. It seems that the licensee found this problem when implementing it in C++, ...

BP - Nativized builds will incur data loss in a Blueprint class that contains more than one ChildActor component and for which each had its child actor class set in the Details tab before being renamed away from "ChildActor" in the component editor tree.

Gameplay - Blueprint - Jan 27, 2020

Child actor component templates, when nativized, end up being owned by the converted Blueprint class object, rather than the child actor component template. Furthermore, we don't regenerate the chil ...

Debug render complex collision incorrect for spline mesh components

Physics - Jan 27, 2020

The debug render collision for spline mesh components using a mesh with complex collision is incorrect and is not updated to reflect changes in the mesh's deformation. The collision response itself, ...

BP - Nativized build will crash at runtime if a non-nativized child that inherits from a nativized parent containing a ChildActorComponent sets the CAC class to a non-nativized child of a nativized BP class.

Gameplay - Blueprint - Jan 26, 2020

Current workaround: Add a dummy variable to either BP_Owner_Child or BP_CAC_Child to force one of the two to be nativized. ...

Creating BlueprintActor from EmptyActor produces an Actor with multiple DefaultSceneRoots

Gameplay - Blueprint - Jan 24, 2020

This does not happen with UE4.22. Maybe related to CL#7462096 and CL#7476283. These are fixes for UE-74598. ...

BlueprintGetter does not work with or disable AnimGraph Fast Path

Anim - Jan 23, 2020

When used as part of the fast path in an ABP, variable Blueprint Getters are not used. If something with a getter that does not conform to or is supported by fast path, is used then fast path should ...

With Ray Tracing Enabled And The RenderDoc Plugin Enabled Shadows Don't Render Correctly On Reflective Materials

Rendering - Ray Tracing - Jan 23, 2020

When the RenderDoc plugin is installed with raytracing enabled shadows don't render correctly. Found in 4.24.1 CL#10757647 Reproduced in 4.23.1 CL#9631420, 4.25 Main CL#11087956 ...