Using TMap Contains( ) with automated unit testing can result in a false return, when the element of the TMap exists.

UE - Automation Test - Jul 27, 2016

If a user relies on the automation unit testing, they can get a incorrect result when using TMap because Contains( ) doesn't always return the correct result. ...

Movie play following Open Source crash editor when changing viewport size.

Media Framework - Mar 29, 2017

When playing movie in PIE, changing viewport size leads to Engine crash. This is not reproduced in 4.14.3 ...

AI Perception UnregisterSource Sense == nullptr does not affect pending adds

UE - AI - Perception - Jun 15, 2022

UAIPerceptionSystem::UnregisterSource according to its documentation should treat Sense == null as targeting all sources, but the code for removing pending sources does not treat Sense == null as th ...

Editor crash when adding to Instanced Static Mesh Component is created/populated at runtime.

Tools - Sep 26, 2017

If NewObject is used to create an instanced static mesh component at runtime, populating the component with AddInstance causes the editor to crash. Regression: Yes - repro steps provided did not cr ...

WidgetInteractionComponent Simulate Key Press/Release only works the first time

UE - Platform - XR - Oct 6, 2022

Occurs 3/3 times. Working around this includes closing the menu and reopening it to reset the button(s). The expected behavior is that the user should be able to select Reset Orientation repeatedly ...

Actor references in Level Blueprint show an incorrect display name after converting the project from 4.6.1 to 4.7 Preview or 4.8

UE - Gameplay - Blueprint - Jan 26, 2015

Actor references in Level Blueprint show an incorrect display name on their nodes after converting the project from 4.6.1 to 4.7 Preview or 4.8. Reproduced in 4.7.1 Preview 4 and in Main (Promotabl ...

Editing bsp within folder in world outliner will unhide bsps within a subfolder

UE - LD & Modeling - Modeling Tools - BSP - May 4, 2016

Editing bsp within folder in world outliner will unhide bsps within a subfolder Regression (No) issue (does) occur in 4.10.4 ...

Refreshing node does not resolve error and causes tooltip to display another line with same message with each refresh.

UE - Gameplay - Apr 14, 2017

Clicking the compile button in the Blueprint editor resolves the error. ...

Update Capture causing Post Process Flickering across whole scene

UE - Graphics Features - Jun 30, 2015

When a Scene Capture Actor is updating the content via an Update Content Node, the Static meshes in the world will flicker or pulse according to the update timer for the Scene Capture Actor. This o ...

SetActorLocation does not affect WheeledVehicles

UE - Simulation - Physics - Sep 21, 2015

When using SetActorPosition() on a WheeledVehicle, it does not affect it in any way. This worked previously in 4.8. This has also been tested in main CL# 2698791 This may be related with: https:// ...