Unreal Engine Issues
Unreal Engine Issues
Incorrect geometry for OnMouseMove event on Slider with RightToLeft flow direction
UE - AI Workflows - UI Systems - Slate - Jan 28, 2026When a slider is in RTL flow direction, and thus its position is changed, the handle is not drawn at the correct position during mouse drag. Instead, the handle draws as if the slider was not moved ...
[CrashReport] libUE4Editor-VulkanRHI.so!FVulkanCommandListContext::RHIDrawIndexedPrimitive(FRHIIndexBuffer*, int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) [VulkanCommands.cpp:818]
UE - Rendering - Architecture - RHI - Apr 29, 2019Generated from CrashReporter ...
Client is unable to Server Travel with the host when Seamless Travel is disabled
UE - Framework - Networking - May 5, 2022Client is unable to Server Travel with the host when Seamless Travel is disabled. Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 and the client is able to join in, it is a regress ...
r.VolumetricRenderTarget.PreferAsyncCompute producing different visuals
UE - Rendering - Features - Aug 2, 2024When the cvar "r.VolumetricRenderTarget.PreferAsyncCompute" is enabled, it will cause Volumetric Clouds to ignore the influence of Volumetric Fog. In high-fog environments, this can cause the clouds ...
Previewing Nav Mesh in DX12 Mode causes Editor to Crash
UE - Graphics Features - Mar 7, 2016In UE4.11p6, previewing Nav Mesh in DX12 Mode causes Editor to crash. ...
Crash when adding a camera to the world in VR Mode
UE - Editor - Workflow Systems - May 31, 2017Dragging a Cine Camera Actor into the world causes the editor to crash. I reproduced this with both Oculus and Vive, however had a more successful repro rate with Oculus. ...
[CrashReport] Ran out of memory - FFixedUObjectArray::PreAllocate()
UE - Foundation - Core - UObject - Sep 7, 2017This is a somewhat common crash affecting users in 4.17. Users have not provided any descriptions of their actions when the crash occurred. Source Context 165 if (GWarn) 166 { ...
[CrashReport] UE4Editor_Renderer!FMaterialShader::SetParametersInner<FRHIVertexShader * __ptr64>() [shaderbaseclasses.cpp:181]
UE - Graphics Features - Jun 8, 2018No user comments in crash group 177 ERHIFeatureLevel::Type FeatureLevel = View.GetFeatureLevel(); 178 check(Material.GetRenderingThreadShaderMap() && Material.GetRenderingThreadSha ...
ILC/VLM doesn't affect Static Staticmesh at all on Mobile
UE - Platform - Mobile - Sep 23, 2019In practice, developer wants some Static-Staticmesh actors don't build lightmaps to save iteration time as well as Memory and Package size; but still want lit by Indirect lightings ...
Nativization of Blueprint Subclass of PlayerStart fails
UE - Gameplay - Feb 23, 2018Fail to package with nativization. cannot convert from 'USceneComponent *' to 'UBillboardComponent ...