Unreal Engine Issues
Unreal Engine Issues
Memory Leak When Hovering Over a Folder Containing Blueprints
UE - Editor - Content Pipeline - Content Browser - Jun 7, 2016Hovering the mouse cursor inside a Content Browser folder that contains blueprints causes the memory usage to steadily increase. This only seems to occur with blueprint assets in the folder. A use ...
DDC corruption creates incorrect pasted topology when using Landscape Copy / Paste Tool
UE - LD & Modeling - Terrain - Landscape - Apr 3, 2017I noticed that the copy and pasted section of the level was being painted while I was painting a nearby section of the level. This weird yellow color appeared and I undid and redid the paint to make ...
Actor moves between levels when using Convert Actor
Tools - Jan 9, 2017Using Convert Actor when the wrong level is selected can cause the actor to move levels. This doesn't seem to happen with every actor type but is 3/3 reproducible using the steps provided. User Des ...
Plugin dependencies causing RI parameter initialization failures (UDN)
UE - Niagara - Oct 6, 2023Error on some Niagara emitters using the WindForce module: LogNiagaraEditor: Error: Invalid input type found while attempting initialize new rapid iteration parameters. Function Node: /Game/FX/Expl ...
Destructible Meshes that are fractured while using moving will rest and then move the whole components fractures as a whole
UE - Simulation - Physics - Destruction - Nov 26, 2014DESCRIPTION: When a destruction mesh has been setup to move to a location or use a lerp if it is destroyed the components will fall, come to a rest, and then the entire destruction destruction mesh ...
Crash with FBX with LODs when distance fields and Generated Lightmaps are enabled
UE - Graphics Features - Jan 12, 2015DESCRIPTION: When importing a mesh with 1 or more additional LODs when Generate Mesh Distance Fields has been enabled via the Project settings will cause a crash if the import options include using ...
World Partition Editor minimap build failed
UE - World Creation - Worldbuilding Tools - Aug 10, 2023The issue was reproduced when building a minimap for an open world level with no Actors with "Is Spatially Loaded" enabled. Placing additional Actors with "Is Spatially Loaded" enabled in the level ...
Sphere Reflection Captures overridden by Skylight
UE - Graphics Features - Jun 10, 2025When using non-Lumen lighting and Screenspace reflections off, the skylight location overrides the Reflection Capture location during Build Reflections. This results in a Reflection Capture taken fr ...
Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node
UE - Gameplay - Blueprint - Jul 18, 2022This is not a regression. Tested in //UE4/Release-4.27 CL18319896 Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node. ...
ChaosCacheManager is not reproducing Collision Events the second time you Record and Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Collision events the second time (and onwards) we record a Geometry Collection (GC) breaking session. Particles set to track Collision Events correctly fol ...