Changes in Scale are not replicated on the Client through RPCs

UE - Networking - Apr 27, 2015

Changes in Scale are not replicated on the Client through RPCs. Location and Rotation are replicated as expected. Reproduced in 4.7.6 binary and Main (//depot/UE4/Promotable-CL-2522625) ...

Niagara Regression - Looping particle with Spawn Burst Instantaneous on time 0.0 flickers for a frame between loops

UE - Niagara - Jul 16, 2025

Note: This worked correctly up to UE 5.4, but repros from UE 5.5 up to mainline latest. If a Niagara Emitter is set up with "Spawn Burst Instantaneous" on time 0.0, and the spawned particle(s) have ...

Invalid Operand "WorldPartition" when calling FAutomationEditorCommonUtils::CreateNewMap();

UE - World Creation - Worldbuilding Tools - World Partition - May 13, 2022

LogAutomationController: Error: LogEditCondition: WorldSettings - EditCondition attempted to use an invalid operand "WorldPartition". ...

UnrealMatch3 ensures when launching on iOS

Docs - Samples - Aug 21, 2016

While running regression pass, found that UnrealMatch3 hits an ensure when user selects to Launch on to iOS device. LogOutputDevice:Error: The ini file '../../../UnrealMatch3/Saved/Config/IOS/Device ...

The drawing order of widgets becomes wrong when GlobalInvalidation is enabled,

UE - Editor - UI Systems - Slate - Nov 26, 2021

When trying to create a widget with specific steps, the drawing order may not be correct. This is not reproduced when Global Invalidation is disabled, and the state can be restored. This issue is pr ...

Split screen - Player 2 doesn't receive input when created with Create Local Player node

UE - Gameplay - Input - Jan 4, 2023

This is a regression. Tested in //UE5/Release-5.0 CL20979098. Split screen extra controllers ignored when using Create Local Player node. May just be Enhanced Input related. ...

Ensure occurs when RBAN simulated rigid body approaches UseComplexAsSimple mesh

UE - Simulation - Physics - Character - Jun 30, 2022

When a collision enabled RBAN node attempts to collect surrounding meshes, if there is a mesh with UseComplexAsSimple, it will hit the Ensure when cloning a mesh on the task graph thread. Disabling ...

Destructible Event OnComponentFracture fires multiple times when Debris flag is enabled.

UE - Simulation - Physics - Destruction - Jul 15, 2015

When using a Destructible that is using the Event OnComponentFracture and the flags for Debris timeout/max separation and Debris Enabled will cause the event to fire for each chunk removed from the ...

[AI] Crash when gathering heightfield geometry on worker thread

UE - AI - Navigation - Jun 25, 2025

From the body of the ticket: We aim to do as much of the work off the game thread as possible to avoid impacting frame rate. We've recently found a crash during collection of the geometry slices fr ...