Undo/Redo can cause the gizmo to desync from a leaf-selected component

UE - Editor - Workflow Systems - Oct 18, 2021

This is a regression from 4.27. This is happening because of the change to typed elements. UEditorEngine::PostUndo, when combined with the typed element changes causes the selection set to reorder ...

AbilityTask_PlayMontage will 'zombie' if Interrupted during BlendOut

UE - Gameplay - Gameplay Ability System - Apr 14, 2023

User reports: I've noticed a bug with PlayMontageAndWait There are 4 possible triggers when a Montage completes:OnCompletedOnBlendOutOnInterruptedOnCancelled Once OnBlendout has been triggere ...

Some Niagara FX does not show up in MovieSceneCapture when AgeUpdateMode is DesiredAgeNoSeek

UE - Niagara - Cinematics - Sep 17, 2024

CL23957356 changes how to calculate FrameOffset in FNiagaraSystemUpdateDesiredAgeExecutionToken::Execute(). After this change, DesiredAge + FrameOffset could be 0.0 for some a couple of initial fram ...

Niagara module inputs don't handle bitfield enums correctly

UE - Niagara - Feb 17, 2025

As one clicks on the enum fields trying to form an input, the log is written with a variation of the following: [2025.02.14-17.42.38:940][521]LogNiagaraEditor: Error: Error getting default value fo ...

Exporting process stuck in "Estimated time" phase when uploading projects with Panorama Sets & Presentation after freshly booting TM

TM - Core - Dec 4, 2024

Cloud Build: TWINMOTION CL app-2023.2.33001994-2024.1.37216540-2025.1.38508591-cloud-2024.12.02.095314 (DEV / STAG, CHROME) Issue: Exporting process stuck in "Estimated time" phase when uploading p ...

Overlapping isn't updated on replicated components after SetWorldTransform

UE - Networking - Dec 10, 2015

Overlapping isn't updated on replicated components after SetWorldTransform. Updating the transform on the Actor itself updates the overlapping as expected. Reproduced in 4.10 and Main (CL# 2798114) ...

Deleting animation key values of ParagonKhaimera's 1D BlendSpace while the animation is previewing in Animation Editor will result in Engine crash

OLD - Anim - Jan 30, 2019

Deleting ParagonKhaimera BlendSpace 1D key values while the animation is previewing in Animation Editor will result in Engine crash. ...

[CrashReporter] Crash in FAnimNode_StateMachine::Evaluate()

OLD - Anim - Aug 22, 2016

This JIRA was created as a result of it being one of the top crashes occurring in 4.13 Preview 2 Error message: Access violation - code c0000005 (first/second chance not available) Source Context ...

Doing a scene capture of a particle off screen on a thread other than the game thread in a packaged game asserts/crashes

UE - Niagara - Feb 15, 2018

From licensee: When building and running the package on windows or other platforms, the game stops at an Assert when a particle is being rendered (off screen) from a thread other than the game thre ...

UnrealFrontend doesn't package client and adds both -noclient & -client argument when both server and client is selected to be packaged in same profile

UE - Platform - Apr 15, 2022

Repro Ratio: 4/4 Regression tested in //UE5/Release-4.27.2 CL-18416816 and this issue DID NOT happen. When looking at the log output of the Project Launcher, the command that is ran is:-ScriptsFor ...