Crash when implementing interface to child blueprint and then implementing it with parent blueprint

UE - Gameplay - Blueprint - Jul 11, 2016

If the user uses a Blueprint Interface in children Blueprints and then goes to the parent Blueprint and tries to implement the same Blueprint Interface in the parent Blueprint, the editor will crash ...

User cannot undo the automatic changing of Mobility settings

Tools - Sep 12, 2016

When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by t ...

Blender exported assets flip material elements on import in 4.14 P1

UE - Editor - Content Pipeline - Import and Export - Nov 7, 2016

In 4.14 Preview 1, assets imported from Blender 2.77a flip material elements, causing materials to appear incorrectly once placed in level. Regression (yes) issue (does not) occur in 4.13.2 ...

Using the arrow keys to navigate the Attach To dropdown causes accidental selection

Tools - Sep 27, 2016

When using the arrow keys to navigate the Attach To menu, the first actor that is highlighted will automatically be selected instead of allowing the user to select the actor they wish. Regression?: ...

changing physics type to simulated causes bodies to simulate in phat

UE - Simulation - Physics - Jan 18, 2017

1. open qa game 2. open a physics asset with multiple bodies 3. select a body and set its physics type to Simulated. 4. Notice simulation starts immediately even though we are not simulating. ...

Regression: Visibility property is not seen in the animation track in UMG

UE - Anim - Sequencer - Mar 6, 2017

Visibility track in 4.15 launcher version is not visible. Converted projects from previous version which already had this track, but cannot create new one. If I add Interp keyword in the UPROPERTY, ...

Editor crashes after redoing the addition of a component to a static mesh actor

Tools - May 30, 2017

This is not a regression. This also occurs dating back to 4.15 and 4.14. The editor crashes on this check in FLevelEditorActionCallbacks::Paste_CanExecute() when updating the Edit menu state: chec ...

[CrashReport] MetalRHI crash - void FForwardLightingParameters::Set<FRHICommandList, FRHIPixelShader*>

UE - Graphics Features - Jul 20, 2017

This is a common crash affecting Mac users in 4.16. User DescriptionsI tried to build the lighting and it keeps crashingWhenever I attempt to build the project or change the preview rendering to IO ...

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 ...

Material Instance values lost when using Material Parameters inside of multiple Material Functions

UE - Rendering - Architecture - Materials - Mar 30, 2018

Material Instance parameters (that derive from parents using material functions) can have their data shifted or not saved. ...