Use mouse for touch enables gesture action on button which makes the button to lost focus to that the button fires onreleased event

UE - Editor - UI Systems - Slate - Mar 20, 2019

When Use mouse for touch is enabled, the button fires onreleased event. Here is what I investigated. Use mouse for touch enables gesture action in the button that leads to LongPress gesture fires ...

Hierarchy is lost when components are copied from one blueprint to another

UE - Gameplay - Blueprint - Jun 8, 2015

If a user has a list of components with a hierarchy, the hierarchy is lost in the target location if they copy the components to another blueprint. ...

An InstancedStaticMesh component set to Stationary doesn't register overlaps

UE - Simulation - Physics - Dec 16, 2016

An InstancedStaticMesh component set to Stationary doesn't register overlaps. However, overlaps are registered on Static and Movable. There is also an issue where actors that start overlapped with ...

World Origin Shifting Rendering Desync On Play

UE - World Creation - Worldbuilding Tools - World Composition - Jan 27, 2020

Message to rebuild lights does not display after static mesh position has changed

UE - Graphics Features - Aug 28, 2024

In a static lighting environment, moving static objects no longer marks the built lighting as invalid. This prevents the on-screen warning from appearing. Regression introduced in CL: 25964466 on / ...

Bake Pose is not applied correctly when using LODSettings asset

UE - Anim - Rigging - Jul 16, 2025

The Bake Pose setting does not work when using a SkeletalMesh LODSettings asset. After the change in CL22878911, the BasePose in the LODSettings asset is no longer copied to the BakePose in the skel ...

Editable text boxes (UMG) are displying the incorrect character when packaging to HTML5

UE - Platform - Mobile - Feb 10, 2015

When you add a editable text box to a project via UMG and package and deploy that project for HTML5, The Text box will show invalid characters when certain keys are pressed. I have attached a photo ...

Splines handle box collision and collision from other shapes differently

UE - Gameplay - May 26, 2016

Splines handle box collision and collision from other shapes differently. ...

Apex Cloth will not render correctly with cloth assigned to multiple materials

UE - Simulation - Physics - Character - Nov 12, 2015

Apex cloth material assigned to multiple material elements will not render correctly in Persona or when PIE/Simulate in the editor. Any material element other than element 0 will be masked/invisible ...

Crash When server traveling from one level and then back again after calling a multiclass event (using Play as Listen Server)

UE - Gameplay - Blueprint - Apr 20, 2018

A crash occurs when switching back and forth between levels when using seamless travel. This happens if a multicast was called and if it contains a member variable. ...