Crash when changing to Mesh LOD Coloration view mode with Paper2D sprites

UE - Graphics Features - Jan 11, 2021

Crash in the editor when changing the view mode. This occurs because of a nullptr dereference of "InMaterialInterface" in the FDebugViewModeMaterialProxy constructor (Line 32 in DebugViewModeMateri ...

Data validation FAILED due to IWBE_Blutility containing invalid data

UE - Content - Engine - Jan 11, 2021

4.26[AssetLog] D:\Binary\UE_4.26\Engine\Content\Tutorial\InWorldBlueprintEditing\TutorialAssets\IWBE_Blutility.uasset: Default__IWBE_Blutility_C is not valid. See the MapCheck log messages for detai ...

[Soundfield Submix][Crash] - Unreal Ambisonics Crashes on Packaged Game and in Standalone

UE - Audio - Submixes - Jan 11, 2021

Issue was reported by a user on the Unreal Engine forms. I tried to package the game with the other encoding options and this appears specific to using the Unreal Ambisonics option.  I have only co ...

Vulkan RHI when execute the node "Create Render Target 2D" when enabling the option "AutoGenerate Mip Maps"

UE - Rendering Architecture - RHI - Jan 11, 2021

Unreal Crash in with Vulkan RHI when execute the node "Create Render Target 2D" with the option "AutoGenerate Mip Maps" then execute "Draw Material to Render Target" Opening the project also opens ...

[CrashReport] libUE4Editor-ApplicationCore.so!X11_SetWindowPosition [SDL_x11window.c:863]

UE - Platform - Linux - Jan 11, 2021

Generated from CrashReporter ...

'Force Volumetric' property broken on instanced static meshes

UE - Graphics Features - Jan 11, 2021

Regular static meshes work expectedly with Force Volumetric however instanced static meshes do not. ...

Unreal 4.26 Crashes when playtesting with a groom in the scene

UE - Graphics Features - Jan 8, 2021

When you hit play with a groom in the scene, the engine crashes Additional notes: First tried adding it to a skeletal mesh through a character blueprint. Engine crashes. Engine doesn't crash if pla ...

Spawnable templates can reference other spawnables and their levels in a sequence

UE - Anim - Sequencer - Jan 8, 2021

Spawnable templates can reference other spawnables. These references will be unstable due to the nature of spawnables, and the level reference can lead to unexpected behavior.  ...

DateTime Variable in Sub Widget resets on Compile

UE - Editor - UI Systems - Jan 7, 2021

When attempting to set the default value of a date time in a sub widget the changes are not kept after compiling. ...

Enabling window animations causes dropdown menus to flicker and become unselectable

UE - Editor - UI Systems - Slate - Jan 7, 2021

Not a regression as I was able to repro this in 4.25.4 The bug doesn't occur every single time, you may need to try disabling/re-enabling the setting and/or clicking on the menu dropdowns a few tim ...