Compiling after adding a StaticMesh Component to a Child Blueprint of a Parent Blueprint causes the inherited StaticMesh Component to disappear

UE - Gameplay - Blueprint Editor - Oct 5, 2017

The Inherited StaticMesh Component in a Child Blueprint of a Parent Blueprint disappears when compiling the Blueprint. Regression: Yes Occurs in: 4.17.2, 4.18(Preview), and 4.19(Main) Does not o ...

[CrashReport] - TRawMessageHandler<FTargetDeviceServicePong,FTargetDeviceProxyManager>::HandleMessage()

UE - Platform - Mobile - Jan 25, 2018

User comments:Packaging Android Crash with similar callstack fixed in 4.16: [Link Removed] I verified that the repro steps in that bug do not cause a crash in 4.18.3 Similar crash on Mac: [Link Re ...

UUserWidget::SetPositionInViewport does not function as intended

UE - Editor - UI Systems - Oct 15, 2018

The Set Position in Viewport node does affect UserWidgets position. It keeps it 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21  (CL - 4465720), 4.22 (CL - 44654877) ...

Editor crash when Landscape Comp. LODBias set to value greater than 0

UE - LD & Modeling - Terrain - Landscape - Mar 20, 2018

When LODBias for a landscape component is set to anything greater than zero, the editor will crash. Reproduced in 4.19.0 CL 3944462 and 4.20 Main. Not able to be reproduced in 4.18.3 CL 3832480. T ...

Widget With Spinbox Crashes When Destrcutor Is Called With Multithreaded Destruction Enabled

UE - Foundation - Core - UObject - Feb 28, 2020

When a widget with a spinbox is calls it's Destructor with "Multithreaded Destruction" enabled the engine crashes. I have tested in 4.23.1, 4.24.3, and 4.26 Main with "Multithreaded Destruction" dis ...

DrawMaterial() Function not Rendering Translucent Material to HUD

UE - Graphics Features - Sep 4, 2015

After creating a new HUD blueprint class and calling it to render a translucent material, the material does not render at all. This is not the case with any other Blend Mode when called to render to ...

Ribbons Don't Follow Their Source Particles When Scaling

UE - Niagara - Mar 23, 2020

When Ribbon Data in a particles system that is following is scaled in an instance the ribbons scale appropriately, but they don't follow updated location of their source particles. See the attached ...

A widget set in the Grid Panel reverts back to it's default size and position when compiled

UE - Editor - UI Systems - UMG - Apr 13, 2022

A widget set to a specific row and column within a Grid Panel, that has been assigned multiple rows and columns, and then spanned across other rows and columns reverts to it's default position and s ...

Changing foliage quality during runtime crashes editor/game

UE - World Creation - Worldbuilding Tools - Foliage - Oct 25, 2017

Editor will crash if a foliage type has Enable Scaling Density checked and user changes Engine Scalability Setting for Foliage during Runtime. Alternatively, if Foliage Quality is changed using a B ...

Scrollbox widget moves much slower when using a gamepad

UE - Editor - UI Systems - Aug 1, 2018

Using the gamepad to scroll a scrollbox causes the scrolling to move slower. Tested in 4.18.3(CL - 3832480), 4.19.2 (CL - 4033788), 4.20.1 (CL -  4233996), 4.21 (CL  - 4245542) ...