Set view range scripting functions will not update timeline UI

UE - Anim - Sequencer - Feb 4, 2021

Using the scripting functions to set the view range of a sequence will not update unless the sequence is re-opened. Usual updates for scripting issues like locking and unlocking the sequence don't w ...

User cannot undo adding/removing a constraint from a constraint profile

UE - Simulation - Physics - Aug 10, 2016

User can not undo the adding of a constraint to a constraint profile. You can undo to the point the creation of the profile ...

MRQ reports missing frames when rendering multiple cameras on a Sequencer camera track with Temporal Sample Count > 1

UE - CAPT - Color Pipeline and Rendering - MRQ - Feb 2, 2026

If there are multiple cameras in the Sequencer camera track, everything works correctly when the Temporal Sample Count for anti-aliasing is set to 1. However, when it is set to 3, the following erro ...

Clicking on object causes EndInputTouch to fire on the press instead of the release

UE - Editor - UI Systems - Slate - Sep 18, 2018

When clicking on an object EndInputTouch sometimes fires on the press instead of the release. This was not an issue in 4.19.2 (CL-4033788) and is a regression. However the functionality doesn't appe ...

Shader Complexity does not function properly with Android ES2 or ES3.1 set as the Preview Rendering level

UE - Platform - Mobile - Feb 25, 2019

A user has reported that Shader Complexity is not working properly in 4.21 with the Android ES2 or 3.1 preview rendering level settings. Regression?: No It did not look this way in 4.21 and prior v ...

Niagara System Doesn't Update Mesh Renderer If Static Mesh is Changed in the Emitter

UE - Niagara - Mar 20, 2019

The Niagara System doesn't update the mesh renderer If the Static Mesh is changed to an Imported Mesh in the source emitter Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL#  5470758 ...

Crash occur when using AddSpawnableFromClass with BlueprintGeneratedClass specified

UE - Anim - Sequencer - Aug 13, 2019

BlueprintGeneratedClass is not based UBleupint. So the following code is failed. bool UActorFactoryBlueprint::PreSpawnActor( UObject* Asset, FTransform& InOutLocation) { UBlueprint* Blueprint = ...

Character Jump Height is dependent on framerate

UE - Gameplay - Player Movement - Jul 17, 2020

Character jump height is dependent on framerate, where lower framerate can result in reduced jump height. ...

Widget Interaction component cannot be moved while the game is paused

UE - Editor - UI Systems - Nov 14, 2016

Widget Interaction component cannot be moved while the game is paused. The widget interaction component stops following the mouse when the game is paused (when source is set to mouse) ...