Unreal Engine Issues
Unreal Engine Issues
ScreenPosition material node outputs upside down ViewportUV when launching on android
UE - Graphics Features - Aug 28, 2018ScreenPosition UV upside down on mobile. From User: "I believe the editor mobile preview provides "correct" results, while the mobile device produces upside down results. I ran into this issue w ...
'Malformed sequence hierarchy' ensure hit after modifying sub-sequence tracks
UE - Anim - Sequencer - Sep 5, 2025It's possible for there to be multiple instances of the same sequence in the evaluation states cache if the same sequence is used in multiple sub-sections. Caches are never removed from the evaluat ...
Direct Capsule Shadows with Point Lights also project shadow on opposite side and direction
UE - Graphics Features - Dec 14, 2016When using a Direct Capsule Shadows on a skeletal mesh with a Stationary Point light, depending on the point lights placement, light source radius, and nearby surfaces will cast the shadow on the op ...
UE4Editor does not start when there are no audio devices available
UE - Platform - Linux - Sep 26, 2018UE4Editor does not open when there are no audio input or output devices available. The editor hangs at 83% after it initializes the AudioMixer. This issue looks like it was caused by CL 4396954. Et ...
[CrashReport] UE4Editor_Landscape!FLandscapeSplinesSceneProxy::GetDynamicMeshElements() [landscapesplines.cpp:159]
UE - LD & Modeling - Terrain - Landscape - Nov 17, 2017This is an infrequent crash in 4.18. Users have not provided any descriptions of their actions when the crash occurred. Source Context 147 for (int32 ViewIndex = 0; ViewIndex < Views.Num( ...
Shader Compiler Crashes in Remote Build
UE - Graphics Features - Nov 11, 2019Output log when crashing UATHelper: Packaging (iOS): LogCook: Display: Max memory allowance for cook 16384mb min free memory 0mb UATHelper: Packaging (iOS): LogCook: Display: Mobile HDR setting 1 ...
Actors unrelated to the changelist being validated cause errors
UE - World Creation - Worldbuilding Tools - World Partition - Nov 22, 2023When validating a changelist, unrelated errors to the changelist can appear. Here's an example of running the validation on a cl named "temp cl" which just contains a single actor "Cylinder". The A ...
The Random Audio Node Function 'Randomize Without Replacement' does not Function Correctly
UE - Audio - Apr 6, 2015When attempting to play random sounds using the 'Random' node within the audio editor, the 'Randomize Without Replacement' does not function as explained via the tooltip. The options says that if y ...
Potential Memory Leak when frequently terminating and re-initializing FConstraintInstance
UE - Simulation - Physics - Mar 29, 2022From User: When frequently terminating and re-initializing the FConstraintInstance, there appears to be a leak when cleaning up the disabled joint, which leads to an ever growing list that gets sort ...
Level Object value is lost when a new level is loaded using the same BP
UE - Gameplay - Blueprint - Dec 2, 2021First discovered this on Linux in //UE5/Main. In the repro, you play from level 2; if you opened Level 1 and played from there, the same outcome would occur. LogNet: Warning: Travel Failure: [Clien ...