Creating Widget at run time with an exposed variable causes Engine crash with Assertion

Tools - May 8, 2020

If you are using the default values of the In Size the project will run fine, but changing the values will make the engine crash. This was reported and tested in 4.25 (CL-13144385) and reproduced i ...

Cooked content results in crash on launch of QAGame.exe

UE - Graphics Features - Feb 22, 2019

Seems to be an issue with how the cooker is calling the contents of TM-ShaderModels. ...

Forward Shading: Scene Capture 2D crash when assigning a RGB Capture Source

UE - Graphics Features - Dec 12, 2016

When using Forward Shading for the project, if you assign a source target to a SceneCapture2D and use either BaseColor in RGB or Normal in RGB the editor will crash. Tested with: Broken: 4.14.1 B ...

Bluerpint nativization failed for calling TMap::Find function of a map container with an enum type key

UE - Gameplay - Blueprint - Oct 2, 2020

Followings are nodes in the repro project. [Image Removed] Here's a generated code of the BPvoid ANewBlueprint_C__pf1010915279::bpf__NewFunction_0__pf() { uint8 bpfv__CallFunc_GetInt_NewParam ...

Twinmotion processes may not fully close on Mac after exiting program

TM - Core - Aug 14, 2024

Reported to support in SF [Link Removed] and reported on reddit at [Link Removed]. For Twinmotion 2024.1 on Mac, some users are reporting that Twinmotion processes are still running after closing t ...

Crash when playing with Vulkan Mobile Preview

UE - Platform - Mobile - Sep 21, 2017

Occasionally getting a crash when playing with Vulkan Mobile Preview. Have not had it repro 100% of the time. ...

Imported FBX causes a crash

Tools - Apr 22, 2016

Edit MattK: This seems like more of a cooking issue than an fbx issue. The crash is related to nav collision When adding a FBX import into your project, if you do not close the project out and ope ...

Getting the Outer (GetOuter()) inside AssetUserData::PostEditChangeOwner added to an instanced actor in a level returns the Outer marked with "Trash"

UE - Framework - Nov 20, 2024

When you call GetOuter() inside AssetUserData::PostEditChangeOwner, the Outer that is returned, is marked as "Trash". This is because the object is constructed again when an AssetUserData is added. ...

Scene Depth appears to return zero on iOS

UE - Platform - Mobile - Feb 13, 2017

Scene Depth appears to return zero on iOS. In this test the material applied to an image does not appear to lerp between 0 and 1 for the various objects in the scene, implying that the Scene depth ...

When exporting from a level sequence, the LOD for the bones is based on the camera distance, instead of using LOD0

UE - Anim - Sequencer - Oct 9, 2025

When exporting a level sequence to an animation sequence, the bones used will be based on the LOD for the current camera location, instead of exporting LOD0. This is very noticable if you pull the ...