t.MaxFPS 0 locks FPS to 120 instead of unlocking it in Viewport

Tools - Nov 7, 2017

When unlocking FPS in Viewport it defaults to 120 instead of potential max FPS. If you do this during Launch the 't.MaxFPS 0' or 't.MaxFPS -1' commands unlock the FPS to the max the GPU allows in th ...

Crash when attempting to revert a Child blueprint from overriding its parent's function while it also has a child of its own

Tools - Dec 4, 2017

When reverting the change of overriding a function from a blueprint's parent, the editor will crash if that blueprint has a child of its own. Regression?: No This also occurred in 4.16 ...

User created constraints have a default joint name of "UserConstraint" that cannot be edited

UE - Simulation - Physics - Dec 6, 2018

Constraints created by users are all given the same Joint Name of "UserConstraint" and it cannot be edited. This makes referencing these joints individually impossible. Regression?: No This occurs ...

Deleting animation key values of ParagonKhaimera's 1D BlendSpace while the animation is previewing in Animation Editor will result in Engine crash

OLD - Anim - Jan 30, 2019

Deleting ParagonKhaimera BlendSpace 1D key values while the animation is previewing in Animation Editor will result in Engine crash. ...

Empty Mesh Sections with MergeActors Tool

UE - World Creation - Worldbuilding Tools - HLOD - Sep 27, 2019

Map Check will output the following error, which makes no sense: SM_FourCubes_1 - 1 element(s) with zero triangles in static mesh 'SM_FourCubes' ...

Playing as a Pawn that is a Duplicate of a Blueprint Class doesn't create an Attribute Set

UE - Gameplay - Oct 1, 2019

Creating a duplicate of a Blueprint class that has an AttributeSet seems to be interfering with the creation of the AttributeSet. ...

Hotreload on c++ native actor component class will cause BP edit malfunctioned

UE - Gameplay - Blueprint - Jan 9, 2020

[Image Removed] When the BP editor is opened, hot-reload compile will wrongly serialize a HORRELOAD_XXX object into the BP class and package which can not be found when Editor is opened again after ...

When set the current language and asset group to different languages, the asset group will not work

UE - Editor - UI Systems - Localization - Nov 22, 2020

When set the current asset group language in a particular process, the asset refers to the "source asset" and output warning log. LogPackageLocalizationCache: Warning: Skipping the cache update for ...

Light Propagation Volume does not work on Linux

UE - Graphics Features - Feb 1, 2021

It's easiest to see the change on the top of the table or back of the chairs when following the repro steps. I've attached screenshots of the Windows and Linux comparison with Intensity set to 20. ...

Crash when creating a static mesh from a Procedural Mesh Component that has been used with a Create Mesh Section node

UE - LD & Modeling - Modeling Tools - Mesh Editing - May 5, 2021

When creating a static mesh from a Procedural Mesh Component that has been used by a Create Mesh Section node, the editor crashes. The editor doesn't crash when selecting the Create Static Mesh butt ...