Unreal Engine Issues
Unreal Engine Issues
Widget text fields to not remain highlighted after making changes
UE - Editor - UI Systems - Mar 6, 2019When making changes to the properties of widgets in the details panel, the text fields to not remain highlighted. This functionality appears present in other areas of the engine. Such as when dealin ...
4.24 Instanced Stereo Distortion Error in ComputeBufferUVDistortion
UE - Graphics Features - Nov 13, 20194.24 moves distortion calculations to the file DistortionCommon.ush and its`ComputeBufferUVDistortion` function. The code in the INSTANCED_STEREO define no longer works as `Interpolants` isn't passe ...
Path Tracer Normals Issue
UE - Graphics Features - Path Tracer - Oct 29, 2025Path Tracing normal maps reflect light differently than Lit, and do not look accurate. Also observed in //UE/Release-5.6, CL: 45232827 ...
Unable to select SimplePivotPainterExampleMat Instance's parameter settings if Param button is disabled
Tools - Aug 31, 2017When going through the engine content you are unable to select SimplePivotPainterExampleMat Instance's parameter settings if Param button is disabled. If the button is enabled the settings appeared ...
Foliage Painted on BSP is Deleted after Building Geometry
UE - World Creation - Worldbuilding Tools - Foliage - Dec 15, 2014After painting foliage meshes on a BSP surface and rebuilding the level (more specifically the geometry), the meshes are deleted. This bug is especially nasty because you cannot Ctrl+Z after buildi ...
Custom Events can't be called after changing level blueprint or switching maps
UE - Gameplay - Blueprint - Dec 23, 2014Custom events cannot be called as functions after being made in level blueprints or after changing levels. User must close and re-open editor to be able to call a custom event. ...
Slider doesn't properly bubble the OnKeyDown event
UE - Editor - UI Systems - Apr 7, 2016Once a slider receives keyboard focus, the keys will not navigate away regardless of the navigation settings. This is because the slider's OnKeyDown function does not pass along the call when the ev ...
Users custom AI-heavy project crashes if anything is Built
UE - Gameplay - Feb 2, 2015Users custom AI project crashes if anything is Built. (All, Lighting, Geometry, etc.) The project can be played but receives a message during play that the Navmesh needs to be rebuilt. ...
RoutePointerUpEvent in SlateApplication doesn't check if a drag is occurring for touch events
UE - Editor - UI Systems - Slate - Aug 15, 2016When SlateApplication is routing a pointer up event, it should check bIsDragDropping and call the widget's OnDrop function. Currently, we check for touch events and call OnTouchEnded without checkin ...
OnUrlChanged does not fire on mobile
UE - Platform - Mobile - Sep 28, 2017When using On Url Changed event on mobile devices, the event does not appear to fire as expected. Tested on iphone 5 As a note: The function GetUrl appears to be similarly affected. ...