Unreal Engine Issues
Unreal Engine Issues
Unable to package for Linux with exceptions enabled
UE - Platform - Linux - Oct 9, 2018Licensee's project requires the bEnableExceptions flag to be set to true in the Build.cs file. The build compiles for Windows, but when attempting to package for Linux they get these errors: Proce ...
Crash: Unhandled exception UE4Editor_Renderer!FMobileBasePassMeshProcessor::Process
UE - Graphics Features - Mar 14, 2019HUD can cause a crash when used with Mobile. "When running from visual studio exception happens here: https://github.com/EpicGames/UnrealEngine/blob/4.22/Engine/Source/Runtime/Renderer/Private/Mobi ...
TimeSynth when reactivated doesn't continue playback from where it was deactivated
UE - Audio - Dec 9, 2019This issue only occurs with -audiomixer passed into the Engine (4.23) and in 4.24/4.25 where it is enabled by default. The user tried deactivating and reactivating Time Synth component to pause it ...
Landscape Tool crashes on Layer Import
UE - LD & Modeling - Terrain - Landscape - Mar 12, 2020The heightmap and weightmaps were created using Terresculptor, and exported in the correct format. If you import everything except the layermaps, the landscape is generated and the layers can be pai ...
Character jumping can become permanently blocked under subpar net conditions
UE - Gameplay - Player Movement - Dec 8, 2023Problem Under laggy networking conditions, if the user rapidly presses the jump button the character can at some point stop responding to jump input. Initial Thoughts It looks like there's a logi ...
Changing MaterialQualityLevel causes a crash due to a ShaderMap mismatch in UniformExpressionCache
UE - Rendering Architecture - Materials - Nov 26, 2025A crash may occur when changing the MaterialQualitylevel via Scalability due to a race condition. The issue occurs because in ScalabilityCVarsSinkCallback(), when it creates the FGlobalComponentRec ...
Incorrect number of vertices displayed by ProfileGPU command in Cascade particles
UE - Niagara - Dec 9, 2021This issue was reported by the licensee, but it's possible that the number of vertices in the particles is higher than it really is. ...
Graphics failure when pasting code for a BP node into Color Picker Hex field
Tools - Sep 11, 2015Graphics failure when pasting code for a BP node into Color Picker Hex field Does not occur in 4.8.3 ...
Getting a TextBlock variable from the Return Value of a Create Widget node inside a Player Controller will cancel all the nodes before it in Standalone
UE - Gameplay - Blueprint - May 15, 2015Getting a TextBlock variable from the Return Value of a Create Widget node inside a Player Controller will cancel all the nodes before it in Standalone. Does not occur in other PIE modes, and does n ...
Playing sequences in reverse snaps after sequence has first ran
UE - Anim - Sequencer - Dec 29, 2016I first came across this bug when I was working with Actor Sequences and noticed that the door I had opening would snap back when I tried to close it. Later I discovered that the issue was with play ...