Unreal Engine Issues
Unreal Engine Issues
Widget not able to take input upon launching game
UE - Editor - UI Systems - Feb 28, 2017Widgets are not getting proper input when a game is first launched. Until the player clicks in the window at least once, widgets will not respond to any hover events and the first click will not hav ...
Blueprint with ChildActorComponent causes BP set as child to become dirty on open/edit
UE - Gameplay - Blueprint - Mar 31, 2017If a blueprint has its root component set in code, adding that blueprint as the child actor component of a second blueprint will cause the first to become dirty anytime the second is opened or edite ...
Filename issue for Stick Figure Project 2D project
Docs - Samples - May 2, 2017There is an issue packaging the project Unreal Stick Figure 2D project that is available in the learning tab. The project cannot package from the outset because of a couple of files that uses space ...
Material Panner displays unusual behavior with timeline update
UE - Graphics Features - Jun 1, 2017A material with a panner displays unusual behavior when the value of the panner's speed it dependant on a timeline. As time spent in the project increases the speed of the material while changing va ...
[CrashReport] Mac crash in UE4Editor-Core.dylib!FApplePlatformString::TCHARToCFString()
UE - Platform - Apple - Jun 8, 2017This is a common crash on Mac that has been occurring since at least the 4.14 release. Based on the one user description this may be related to the creation of structs. Additional information is n ...
Crash upon editing a GameplayTagQuery inside of a DataAsset
UE - Gameplay - Oct 27, 2017When a GameplayTagQuery variable is edited from inside of a DataAsset, the editor crashes when the changes are saved. This could be related to a bug that was fixed previously: [Link Removed] Regres ...
Certain materials are overly bright with Ray Traced Global Illumination denoiser
UE - Graphics Features - Lumen - Mar 14, 2019Ray Traced Global Illumination is causing some materials to glow extremely bright Disabling r.raytracing.globalillumination.denoiser fixes the issue In 4.22 preview 5 binary (5365847) the result i ...
Arrays of Soft Object local variables are not captured for reference graph
UE - Gameplay - Blueprint - May 20, 2019This bug comes from https://udn.unrealengine.com/questions/492861/view.html and is a very similar problem to [Link Removed] The issue is that the code that harvests soft object references stored in ...
Static lights become stationary after toggling visiblity of level in packaged build
UE - Rendering - Graphics Features - Jun 11, 2025In 5.5, there is a regression with baked lighting where static lights become stationary lights when a level is hidden and then made visible again. This happens in packaged builds and shows up as sta ...
PlayerCollision visualization incorrect on LandscapeSplineMesh when Nanite is enabled
UE - Rendering - Features - Nanite - Dec 3, 2025From licensee: I’ve found an issue with the visualization of PlayerCollisions when using LandscapeSplineMesh with a mesh that has Nanite enabled. The Chaos collisions shown in the Chaos Visual Debu ...