Crash when copying and making a button widget the root of a second widget blueprint

UE - Editor - UI Systems - Apr 13, 2021

Pasting a button element from one Widget Blueprint into a second Widget Blueprint that has had its root Canvas Panel deleted results in a crash. The crash only occurs when the Canvas Panel is delete ...

Skelmesh Bake Materials doesn't remove old materials from slots

UE - LD & Art - World Building - Merge Actor - Mar 24, 2021

When an LOD get materials reduced to one with Bake Materials, it doesn't delete the extra slots on the LOD. So if starting with 10 slots on the skelmesh, then baking, slot 1 gets the newly baked mat ...

Moving a function to the parent class does not update the FunctionReference on calling nodes

UE - Gameplay - Blueprint Editor - Mar 19, 2021

When SMyBlueprint::OnMoveToParent() gets called the callsites of the function are never updated in dependent blueprints. This results in any UK2Node_CallFunction's not having their `FunctionReferen ...

Pasting an Emitter In Niagara System is not created at cursor position

UE - Rendering - Niagara - Mar 10, 2021

Not a regression as this also occurs in //UE4/Release-4.25.4 Behavior should work like other BP nodes, where copy/pasting puts the node where the mouse cursor is located. Current behavior is time ...

virtual texture lightmap crash due to pixel format r8Unorm_srgb in MacEditor

UE - Rendering - RHI - Mar 4, 2021

Currently r8Unorm_srgb is required by virtual texture lightmap, and the Metal RHI simply forbids r8Unorm_srgb on Mac platform. Since the latest MacOS 11.0+ have the support of r8Unorm_srgb, we shoul ...

[CrashReporter] UE4Editor-Renderer!static void RenderViewFamily_RenderThread(class FRHICommandListImmediate & const, class FSceneRenderer *) [SceneRendering.cpp:3619]

UE - Rendering - Mar 1, 2021

User comment: "...can't launch anything as standalone, only simulate..." Generated from CrashReporter ...

Undoing a curve editor change removes current selection

UE - Anim - Sequencer - Feb 9, 2021

Undoing a curve editor change removes current selection ...

Linux - Crash when moving/turning the viewport camera in project that contains hair

UE - Rendering - Feb 2, 2021

I've attached the project log, crashreport, and crash info to this ticket. This issue only appears to be happening on Linux (On both Nvidia/AMD cards) and does not happen when the hair is disabled i ...

Enabling ChaosCaching plugin results in packaged game no longer opening

UE - Simulation - Physics - Destruction - Jan 19, 2021

ChaosCaching plugin appears to break packaged games. No warnings/errors reported in the log or when attempting to open the produced .exe. My task manager does not show the game process running at al ...