NiagaraSystem is compiled every time when first loaded in the editor

UE - Niagara - May 20, 2022

If you are using a large amount of Niagara, you will experience excessive load times in PIE even if nothing is changed. The following code change seems to be effective as an interim response. void ...

Blueprint "Diff Against Depot": Restoring an instanced object results in reference to the object in the temporary diff asset

UE - Framework - Blueprint - Feb 19, 2024

When diffing a blueprint against depot via the Content Browser context menu action "Revision Control > Diff Against Depot", restoring an instanced object property from the depot version results in t ...

TakeRecorder cannot record Auto Activate and Destroy of Niagara effect

UE - Niagara - Apr 1, 2024

When Niagara FX of a recording actor is spawned during taking a record, that FX behavior must be recorded and able to be playbacked. However, Niagara Component Auto Activation by BP node is not reco ...

Vehicle wheels ignore collision settings of vehicle in vehicle template

UE - Simulation - Physics - Nov 25, 2015

In the vehicle template, vehicle wheels ignore collision settings of the vehicle when they are set to custom and altered. ...

Unreal Header Tool can sometimes fail if an Engine plugin is Enabled By Default and has the "Program" Module Type set

UE - Foundation - Core - Feb 15, 2018

An Engine plugin with the Program module type and EnabledByDefault set to true can cause the Engine to fail to build successfully due to UHT failing. I was only able to reproduce this behavior using ...

NDisplay hangs and stops responding on cluster event send

UE - Virtual Production - nDisplay - Nov 12, 2019

"The test event is set up using the default CE port, but every time an event is sent through the launcher the display receives the input and processes it, however the launcher will "hang" and stop ...

Keep Simulation Changes will persist only a subset of changed properties

UE - Editor - Jan 10, 2025

As per the steps to reproduce, Keep Simulation Changes will often only copy back the most recent property changed on a simulating Actor back to the version of the Actor in the Editor level. It is no ...

PlayerController isn't tickable during pause while using the 'Set Tickable When Paused' node

UE - Gameplay - Jun 18, 2015

PlayerController isn't tickable during pause while using the 'Set Tickable When Paused' node. https://answers.unrealengine.com/questions/243791/camera-ticks-but-does-not-update.html User Descriptio ...

GeneratePsyms fails with installed builds due to missing dymp_syms tool and incorrect path space handling

UE - Platform - Apple - Nov 14, 2024

Uncovered while testing [Link Removed] ...

Resetting MovieSceneObjectBindingID property can't update display

UE - Anim - Sequencer - Apr 19, 2024

When reset a MovieSceneObjectBindingID type property, the display of the property is not reset but keep the value before reset, until the property form is clicked. [Image Removed] ...