When a fixed delta time step of 0.02 or higher is used with some skeletal mesh objects, rotational forces applied using AddTorque have no affect on the skeletal mesh.

UE - Simulation - Physics - Jan 27, 2015

Using AddTorque to apply a rotation to a skeletal mesh does not always provide the expected results if a fixed time step is being used. When doing this to the Owen character in the Content Examples ...

Can not affect "r.SetRes" command in editor new window

UE - CoreTech - Jul 11, 2022

When playing in "New Editor Window" mode, entering the r.setres command does not change the screen size. This worked in UE4.27, but no longer works in UE5.0. ...

[CrashReport][Assert] Engine!static class FText R CC AddParameter FMaterialCachedExpressionData QEAA_NAEBUFMaterialParameterInfo AEBUFMaterialParameterMetadata AEAPEAVUObject AEAPEAVUTextureCollection AEAVFText Z QEBA AV7 AEBUFMaterialCachedPa

UE - Rendering - Architecture - Materials - Jun 20, 2025

#15 crash out of 7012 in UE 5.6.1 on Windows#7 crash for UE - Rendering Architecture in UE 5.6.1 on Windows#2 crash for UE - Rendering Architecture - Materials in UE 5.6.1 on WindowsAssertion failed ...

Snap to nearest spline point no longer working in 5.6. Right clicking on a spline point and using the option “Snap to nearest spline point" will no longer snap that point to any nearby spline and will sometimes cause the spline to snap to itself.

UE - Gameplay - Oct 22, 2025

Context: When editing SplineComponents in the level viewport, right clicking a spline point has a context menu action "Snap to nearest spline point". Problem: The problem is, Snap to nearest spline ...

Saving Behavior Tree with Blueprint task inheriting from native class invalidates Blackboard key when BP contains a function

UE - AI - Jul 8, 2025

A regression introduced in UE 5.6 causes Blackboard key selectors in Blueprint tasks to become invalid when the Blueprint inherits from a native subclass of UBTTask_MoveTo (or UBTTask_BlackboardBase ...

LIVE: ProjectileMovement component does not function when a PrimitiveComponent is missing or removed from the Components

UE - Simulation - Physics - Nov 18, 2014

A projectile brought over from 4.5.1 or earlier that does not have a Primitive Component as the Root, or removing the root from the projectile in 4.6, returns an error: "Movement component [Projecti ...

Editing child property values is affecting parent property values

UE - Gameplay - Blueprint Editor - Jan 27, 2020

iOS movie become laggy and crashes when played in iPhone 6/6s.

UE - Platform - Mobile - Feb 24, 2017

Movie play in iOS is laggy and crashes in some movie. This issue seems to be happening when the movie is played in umg widget. Tested in 4.14.3 4.15 Dev_Mobile Latest as of 2/24 Original UDN post ...

Custom Primitive Data is not affected in the skeletal mesh on BP instances in the editor

UE - Rendering - Architecture - Jan 22, 2026

Editing Custom Primitive Data values ​​in the details panel of a placed BP actor with a Skeletal Mesh component does not reflect in the Editor viewport. ...

Buffer Visualization Overview is affected by EV

UE - Graphics Features - Mar 5, 2020

EV -0.5 [Image Removed] EV 0.0 [Image Removed] ...