Unreal Engine Issues
Unreal Engine Issues
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. ...
FBX export - BP StaticMesh Scales from Mesh Origin
Tools - Dec 13, 2018Unexpected behaviour with meshes scaled via BP and exported via .fbx (.obj looks to function as expected) Confirmed in 4.22 Main CL 4648854 ...
Rounding errors are present in FJsonValue::TryGetNumber(int64&) and FMath::RoundHalfFromZero()
UE - Foundation - Core - Mar 8, 2019A licensee reported a bug in rounding of a call to FJsonValue::TryGetNumber(int64&) with large values. In investigating this, it appears that equivalent problems also exist in FMath:: rounding func ...
ARCore: Handheld AR Template doesn't handle background/resume correctly
UE - Platform - XR - Jul 23, 2021When the new template gets backgrounded and resumed, the app might not be fully functional at resume time. Sometimes the plane detection doesn't work. Sometimes the camera goes down. It's not very ...
Flickering shadows/GI when DrawMaterialToRenderTarget is called per tick in PIE
UE - Rendering Architecture - Jul 11, 2024When DrawMaterialToRenderTarget function is called on tick and actors are spawned in game, the lumen shadow/GI visually flickers. Debugging shows that the lumen screen probes are flickering as well. ...
Paper2D Code Template character uses code class in the level
Docs - Samples - Jul 27, 2016In every other code template, the standard setup is to have the code classes be in the template and have all the functionality in them code-wise, but then have a blueprint child setup the assets it ...
Tick fires in PlayerController BP in Editor
UE - Gameplay - Blueprint - Oct 6, 2016If a blueprint has any functionality on tick, the tick event will fire when a blueprint is restored within the editor after closing and reopening a project. Regression (no) issue (does) occur in 4 ...
Disabling "Skip Unneeded Dependency Compilation" clears spline points on component compile
UE - Gameplay - Blueprint Compiler - Apr 5, 2018Spline points are lost when compiling BP component. Component is used in PlayerCharacter. Spline Actor Casts to PlayerCharacter and calls a function on this component. Workaround: Open BP_SplineAc ...
TrackFieldData and SubSectionFieldData structs not properly being serialized during cook in the Precompiled Evaluation Template
UE - Anim - Sequencer - May 3, 2019During compile on the fly if the evaluation field is invalidated SubSectionField data will not have been properly serialized and the meta data will not be populated correctly, as the custom serializ ...