FPS when adding instanced static meshes in a random order is significantly lower than adding them in order by X,Y,Z location

UE - Simulation - Physics - Apr 5, 2017

Adding instanced static meshes in a random order by location gives 25% of normal frame rate, compared to adding them in order by X,Y,Z location. ...

Crash on map reload when blutility is using Get Selection Set

UE - Gameplay - Blueprint - May 24, 2017

Editor crashes on map reload, if an actor in the level is accessed by blutility get selection set. ...

VR PIE with Oculus - Editor Hangs on Level Load (on 2nd+ Launch)

UE - Platform - XR - Feb 9, 2018

Loading a map while in VR PIE hangs on 2nd+ play Does not occur when Oculus plugin is disabled. Does not occur in packaged project. A nonVR PIE will reset this behavior. Additional info from use ...

Navmesh generation doesn't work with Retopologize tool

UE - AI - May 15, 2018

When a Landscape is edited with the Retopologize tool, Dynamic Navmesh is no longer generated. This was also tested with Static Navmesh and yielded the same results. ...

Child Actor components on Clients use the incorrect default values for variables that are not being replicated

UE - Gameplay - Blueprint - Aug 28, 2018

When a Child Actor's class is replicated but the individual variables are not, the individual variables will use the default of the original BP class instead of the defaults that were set in the Chi ...

UDistributionFloat member resets to null upon Blueprint Compile

UE - Gameplay - May 14, 2019

A UDistributionFloat property is reset to NULL when compiling a Blueprint sub-class of a C++ class that has a UDistributionFloat property. ...

Crash when trying to export unsupported Paragon Skeletal Mesh asset in 4.23

UE - Editor - Content Pipeline - Import and Export - Sep 11, 2019

When the user tries to export the Skeletal Mesh of TwinBlast (a paragon character that can be purchased off the marketplace) in 4.23. As of the time of logging this bug it is not supported in 4.23, ...

Cloth Simulation Doesn't Work When Clothing Data Is Applied Before Being Painted

UE - Simulation - Physics - Character - Jan 17, 2020

When clothing data is applied before painting the influence on the section the cloth doesn't simulate. I tested this using the Paragion: Twinblast actionhero skeletal mesh asset. Found in 4.24.1 C ...

Unable to replace variable refs in functions with input parameter variables

UE - Gameplay - Blueprint Editor - May 4, 2020

User is not able to replace a variable reference in a function with an input parameter of the same type. ...

(DX12) Groom simulation crashes GPU when viewport gets hidden and unhidden

UE - Graphics Features - Jun 4, 2020

 Should be related to Groom hair simulation (doesn't crash if hair sim is disabled) Also attaching log files from licensee if that's helpful. ...