Blueprint Implementable Events and Event dispatchers with the same name break the event dispatcher.

UE - Gameplay - Blueprint - Sep 22, 2015

Creating an event dispatcher and BlueprintImplementableEvent function with the same names causes a signature conflict inside the blueprint. The event dispatcher is then broken as it cannot be delet ...

Listen Server Character Movement appears to have no Interpolation

UE - Gameplay - Player Movement - Jun 14, 2016

Listen Server Character Movement appears to have no Interpolation causing the character's movement to appear choppy ...

Exporting Landscape Heightmap using Copy/Paste Tool produces Pixelated results

UE - LD & Modeling - Terrain - Landscape - Jul 6, 2017

When exporting a .raw file heightmap using the Copy/Paste tool, the file produced has a greyscale and pixelated result. ...

Live Node Previews are broken with Coordinates higher than UV0

UE - Rendering Architecture - Materials - May 18, 2015

User reporting the Live Node Preview in the Material Editor will return only Black in the Node when using any UV other than UV0. Also reproduced in Main Promotable-CL-2552010 & Releases/4.8/Promote ...

Collision is not updated on Slave Meshes when using "Set Master Pose Component"

OLD - Anim - Feb 17, 2016

Collision pose is not updated on Slave Meshes when using "Set Master Pose Component". This occurs with both Physics assets and Per-Poly collision This severely effects anybody making characters ou ...

Event dispatcher not working as intended when using Mobile Preview and UMG

UE - Editor - UI Systems - Nov 24, 2014

When setting up UMGs, the Print String will not show in the mobile preview. ...

Scrollbox under multiple retainerboxes doesn’t scroll correctly with PIE

UE - Editor - UI Systems - Aug 14, 2019

When the scrollbox as the child of multiple retainerboxes, the scroll isn't smoothing. It can see issue with PIE only. If it run with standalone (or package build) is fine. In SScrollBar::ExecuteO ...

Painted Vertex colors are not retained when using "Convert Selection to Blueprint Class" in Child Actor mode

UE - Gameplay - Blueprint - Aug 25, 2020

From the User Submission: I spent some time poking through the FComponentInstanceDataCache code and noticed that there is no component instance data saved/applied for'native' component types, so si ...

Slate draws the elements of an array even when the array is collapsed

Tools - Aug 20, 2015

The elements of an array that are shown in the details panel (below the world outliner) are drawn even when the array is collapsed. This can cause a performance drop when using an array that has a l ...

UMG Size to Content issue

UE - Editor - UI Systems - Jan 20, 2016

TextBox(Multi-line) or EditableText(multi-line) in UMG blinks when it meets certain condition in editor. The condition is Both Size to content option for TextBox(Multi-line) or EditableText(multi-l ...