Using the "Keep World" scale rule can result in incorrect relative location when attaching actors

UE - Framework - Components - Dec 9, 2022

This seems to happen due to a precision error when calculating the relative transform between the socket and the component being attached. Occasionally, one of the transforms will have a scale of (0 ...

Inserting before a FSlateImageRun twice will cause crash

UE - Editor - UI Systems - Apr 12, 2019

NiagaraSystem with EniagaraGpuComputeTickStage::PostInitViews rarely crashes due to multi-thread race conflicts

UE - Niagara - Mar 1, 2025

NiagaraSystem with EEiagaraGpuComputeTickStage::PostInitViews should not have bSupportsParallelGDME because of possible multi-threaded contention, but FNiagaraSystemInstanceController::GetGpuCompute ...

Physics Thruster has no effect on destruction mesh

UE - Simulation - Physics - Destruction - Apr 13, 2015

Physics Thruster actor does not affect destruction meshes that it is attached to. ...

Memory Leak caused by auto save files

UE - World Creation - Worldbuilding Tools - World Partition - Mar 20, 2023

Creating "Level Sequence with Shot" with spawnable cameras creates duplicate cameras

UE - Anim - Sequencer - May 31, 2023

This is not a regression as it does occur in //UE5/Release-5.1 @ CL 23901901 Repro Rate: 3/3 times ...

Crash in Middle of PIE with Level sequences and MRQ running

UE - Anim - Runtime - Mar 6, 2023

Repro Rate: 5/5 Tested this a few times and the crash seems to come in at different intervals, some had the prestreaming almost finished, then would crash. Working on a video to show crash to add ...

Crash on Event Begin Play with UMG Widget and 2 or More Players

UE - Editor - UI Systems - Feb 25, 2015

A player with UMG widget created on BeginPlay works fine when hitting play with only 1 player, but if you set the number of player > 1 it will crash. User believes this is somewhere related with t ...

Modifying Notify Properties no longer updates the NotifyName in Blueprints with custom GetNotifyName function.

UE - Anim - Gameplay - Feb 13, 2025

If after placing a notify on an anim sequence timeline you modify a property that is used in the GetNotifyName function of a blueprint notify in engine version previous to 5.5 (5.4.3 for example) th ...

Mesh Paint Mode Hotkeys Invalid

UE - Editor - Mar 20, 2023

In the Mesh Paint Mode in UE 5.1, the keyboard shortcuts to change the brush (size, falloff, etc) are not working. ...