Switching to different modes in the Modes panel causes PIE to take input from a connected VR headset for the Y axis camera movement

UE - Platform - XR - Dec 9, 2016

If a VR headset is connected, it will be used for Y axis camera input in PIE if you have switched to and from the Landscape tab in the Modes panel. You can fix this temporarily by reopening the edit ...

Pin wires do not connect correctly after collapse to function and duplication

UE - Gameplay - Blueprint - Mar 20, 2017

Pin wires do not connect correctly after collapse to function and duplication. Any node can cause this issue, I used an INT variable because it was quick to test with. Regression: This issue affect ...

Ribbon Emitters Do Not Properly Kill Trails On Source Loss

UE - Graphics Features - Nov 18, 2016

"Dead Trail on source lost" doesn't seem to work consistently. This is apparent when the source emitter's duration is longer than the particles being emitted. This bug also occurs if there is vary ...

Mobile Preview dynamic shadows not showing on Mac

UE - Platform - Apple - Dec 19, 2014

When Using mobile preview in the 4.7 preview build, or in the changelist provided, Dyanmic lighting is not showing shadows when changed to movable. Following the steps below, you will see no shado ...

PlayerController::PlayDynamicForceFeedback called through code does not fire

UE - Gameplay - Input - Feb 25, 2016

Calling PlayDynamicForceFeedback in code does not affect controller rumble. ...

Changing transform of simulated component during physics freezes motion

UE - Simulation - Physics - Oct 13, 2016

If something is executed before a SetActorRotation node on Tick inside of a SceneComponent class BP and then added to an Actor class BP, the physics will lag User Description: When using set rotat ...

Multiple monitors bug with UE 4.14 on Mac

UE - Platform - Apple - Oct 26, 2016

In UE4.14, the Editor freezes and is unresponsive and/or user cannot use any element of the editor in the second display Regression: this did not occur in previous versions of the Engine: tested in ...

Display Blueprint Added Components on subobjects with meta = (ShowInnerProperties)

UE - Gameplay - Blueprint Editor - Sep 28, 2021

Right now only native subobjects are displayed in the details panel with meta = (ShowInnerProperties) is set. Child Actor Components are an example of this, where if the child actor you have added h ...

Sky Atmosphere Material Nodes not Correctly Represented in the Surface Cache for Nanite Enabled Static Meshes

UE - Graphics Features - Apr 1, 2025

When nanite is enabled on a static mesh, lighting contributions from Sky Atmosphere material nodes are not incident on the static mesh and no longer present in the overall lighting of the scene. Th ...

Lengthy Compile Times on Blueprints Containing an Array of Self References When Multiple Instances Exist in the Level

UE - Gameplay - Blueprint - Oct 11, 2016

There are lengthy compile times with a blueprint with 50+ instances in the level that contains an array of self references. On lower-end machines, the compile times are upwards of 10 seconds. Found ...