Unreal Engine Issues
Unreal Engine Issues
Expandable Area does not respect scrollbox boundaries unless set to fill
UE - Editor - UI Systems - Dec 13, 2017There is an issue where Expandable Area does not respect scrollbox boundaries unless set to fill. This occurs when the scrollbox is a child of another component. This issue does not appear to be a r ...
EarlyZPassOnlyMateriaMasking Makes Masked Materials on Particles Flicker When Close to the Camera
UE - Niagara - Oct 12, 2018When "r.EarlyZPassOnlyMaskedMaterials" is enabled, masked materials used with particles will flicker when close to the camera. Found in 4.17 CL# 3658906, 4.18 CL# 3832480, 4.19 CL 4033788, 4.20 CL# ...
A crash in editor will result after swapping inherited SCS component names at the parent class level before loading a child class that overrides them.
UE - Gameplay - Blueprint - Oct 26, 2018This is an editor-only crash that's due to stack overflow/infinite recursion in UInheritableComponentHandler::FixComponentTemplateName(). We are recursively trying to rename other inherited componen ...
UIScaleCurve float-point value in BaseEngine.ini lacks precision
UE - Editor - UI Systems - Slate - Jun 4, 2020The screenshots below display 1920x1080pixel widget button. First one with Default DPIScaleCurve shows extra borders on the right and bottom. Next one with more precision shows no extra boundary. [ ...
VFInitRotation(Cascade) always provides the same rotation
UE - Niagara - Jun 30, 2020This problem caused by incorrect initialization of RandomStream in the GPU particle. //PaticleGpuSimulation.cpp virtual void Init() override { ... check(AllocatedTiles.Num() == TileTimeOfDe ...
Nvidia Graphics Drivers cause editor menus to flicker and disappear after using the editor for an extended period of time
UE - Graphics Features - Apr 16, 2021This issue seems to be occurring on a variety of Nvidia cards. So far, I haven't seen any indication that it is affecting AMD graphics cards. The majority of the reports have indicating that the pro ...
Enhanced Input Axis Actions repeatedly firing the last input value when entering a Common UI menu
UE - Gameplay - Input - Sep 7, 2023When using an axis mapped input action such as looking around with a gamepad joystick, then opening a Common UI menu, the last input axis value will keep firing irrespective of the current joystick ...
Some debug modes do not work in PIE
UE - Platform - Mobile - Jan 9, 2024It looks like the output of the debug pass is ignored, and the final output from the last frame before the pass was enabled is displayed instead. If the pass is modified to return a different textu ...
Some instances spawned by NeagaraDataInterfaceChaosDestruction breaking event will be set location to the world origin
UE - Niagara - Nov 29, 2024The following code can often be found in UNiagaraDataInterfaceChaosDestruction.const int32 ParticleID = ParticleIDParam.GetAndAdvance() - LastSpawnedPointID + 1; The LastSpawnedPointID is usual ...
RootMotionModifier_SkewWarp bug
UE - Characters - Animation - Mar 6, 2025In /Game/ABPLinkingShowcase/Blueprints/Pawn_ABPLinkingCharacter: The character mesh’s root location is lower than the capsule’s lowest point. This is what causes the issue. Based on the event graph, ...