UUserWidget::NativeDestruct may be called on a preview widget if PIE is started while the widget needs compilation

UE - Editor - UI Systems - Jun 4, 2018

By starting PIE while an uncompiled widget is open in the widget editor, it's possible to trigger a call to NativeDestruct on the preview widget. This is especially dangerous because NativeConstruct ...

Memory-only FMOD assets cause 'unable to find cached package' spam in log

UE - Foundation - Core - Cooker - Jan 23, 2017

When loading individual events/sounds in an FMOD bank file, the cook will emit a warning for each asset which pollutes the log file with superfluous messages. This is because the actual event/sound ...

Sockets are scaling with imported transformation and passing scaling to attached

OLD - Anim - May 4, 2015

When Skeletal Meshes are imported with a uniform scale, the attached socket will take these scales and pass it along to any object attached to the socket. This is particularly obvious for users who ...

Constraints are broken when capsule component height changed

UE - Simulation - Physics - Jul 20, 2015

James: I think we currently recreate the capsule body when you change dimensions, should just change the shape instead. – DisableCollision is reset if constrained Capsule Component height is change ...

Linear Spline Point Type doesn't distributed over a linear value

Tools - Nov 3, 2015

Linear Spline Point Type doesn't have expected result User Description: I was following a tutorial from Dokipen (Tutorial) about using spline to create linear arrays. Everything is working fine f ...

Add Point node used with an InputKey of 0 or 1 will crash the editor on bp compile

Tools - Nov 29, 2016

Add Point node used with an InputKey of 0 or 1 will crash the editor on bp compile User Description: Unreal version 4.14 crashes every time that you use spline component and try to add the point 0 ...

Particle System Components don't inherit owner's time dilation

UE - Niagara - Feb 7, 2020

This is a regression introduced by the particle system manager. It does not account for the owning actor's time dilation when ticking the particle system components.  ...

Slow while replacing actor in large open world

UE - DEET - EditorPerformance - Nov 8, 2022

Licensee: "Content creators from my team have reported that when they replace actors in an open world it can take more than 10 seconds. This is with several thousand actors loaded in the world. On m ...

Unable to create installed build with iOS support from PC

UE - Foundation - Core - May 3, 2017

Attempting to build a local binary engine from a source engine will fail when iOS support is enabled in the setup process. Command line argument (ran from Engine/Build/BatchFiles folder location): ...

Stationary Point Light is Visible After Building Lighting When Visible is Unchecked

UE - Graphics Features - Aug 30, 2016

While going through a blueprint tutorial which has you build a small structure with a point light in it, then have a script telling the point light to toggle on and off while entering a trigger. I n ...