Edit-> Project Settings -> Collision -> Presets Has No Scroll Bar

Tools - Sep 30, 2015

If you open a project and immediately go to Edit-> Project Settings -> Collision and expand the Presets dropdown, no scroll bar will appear. This prevents you from being able to see all of the optio ...

Assigning an image that is not the default to the Disabled state of a button does not work

UE - Editor - UI Systems - Jan 15, 2015

Tools team notes: Make disabled state hidden. If the user applies an image to the disabled state of a button the button will not reflect this change in game. For example if I were to set the disabl ...

Iris - Destruction of initially dormant actor not replicated to clients

UE - Networking - Iris - Apr 9, 2024

Without Iris enabled, UNetDriver::NotifyActorDestroyed will handle creating destruction info for dormant actors, including any initially dormant, statically placed actors. However, this path seems t ...

Text box events (OnTextCommitted and OnTextChanged) are throwing false warnings

UE - Editor - UI Systems - May 11, 2015

If the user creates an OnTextCommitted event or an OnTextChanged event the user will receive a warning upon compiling the blueprint. Warning received: Warning No value will be returned by referenc ...

Swarm: Not able to set number of processors to use for Swarm from the UI

UE - Graphics Features - Aug 25, 2015

There is a setting called "LocalJobsDefaultProcessorCount" in the Developer Settings tab in Swarm. After the change to make Lightmass build asynchronously while the user keeps working, this set ...

Opening a new sequence can have SavePreAnimatedState and RestorePreAnimatedState called out of order

UE - Anim - Sequencer - Nov 21, 2019

When switching to a sequence where the current time is not in the target view range the PreAnimatedState of the new sequence will be saved before restoring the PreAnimatedState of the old sequence.  ...

GameMode blueprint is not updated/compiled when settings are changed through Project Settings

UE - Gameplay - Blueprint - Jun 7, 2017

When using Project Settings->Maps & Modes->Default Modes to set GameMode defaults, the values will appear to change in the associated blueprint but these changes do not go into effect until the blue ...

Colors of Individual Lens Flare Tints Cannot be Changed in UE 4.18+

UE - Graphics Features - Jun 15, 2018

If you create a project in 4.17 and follow the Repro steps, you will be able to adjust the colors of individual lens flares. If you copy the 4.17 project into 4.18, 4.19, 4.20 Preview, or 4.21 the f ...

Setting Lightmap Coordinate Index Past 3 Causes Mesh to Get No Lightmap Information

UE - Graphics Features - Nov 20, 2018

Meshes with their Lightmap Coordinate Index set to anything over 4 will not be lit by static or stationary lighting.  Found in CL# 4.19 4033788, 4.20 CL# 4369336, 4.21 CL# 4541578, 4.22 CL# 4573698 ...

Adding a StaticMeshComponent pointer to a derived StaticMeshComponent class has inconsistent behavior

UE - Gameplay - Components - Aug 6, 2015

Adding a UStaticMeshComponent pointer to a class derived from StaticMeshComponent allows for two meshes to be set by a single component. Setting two meshes inside a blueprint this way will only allo ...