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. ...

Slowly flickering display in GearVR

UE - Platform - XR - Jul 12, 2017

The appears repeatedly in the log:[2017.07.12-14.57.06:022][ 4]LogHMD: Initializing OVRPlugin session [2017.07.12-14.57.06:652][ 4]LogHMD: Setting user focus to game viewport since session status ...

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 ...

Curve Editor help documentation opens up to a 404 error page

Docs - Mar 14, 2018

When selecting the Help documentation for the curve editor, it brings up a 404 error page rather than the actual curve editor documentation page.  ...

Crash When Toggling Visibility of Level with Planar Reflection

UE - LD & Modeling - Terrain - Landscape - Mar 26, 2018

This crash occurs in 4.19 and 4.20 but not 4.18. Repro'd in 4.19.0-3944462 and 4.20.0-3955769 and 3964322. This is a regression. Per UDN licensee: When I'm showing/hiding levels in editor (in le ...

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. ...

When changing a variable of a component in an attached Actor, the variable becomes read-only

UE - Gameplay - Aug 1, 2018

Changing a variable of a component with an instance of BP derived from StaticMeshActor or SkeletalMeshActor attached to another actor will cause that variable to be read-only. It did not reproduce w ...

Refraction does not display properly on Android devices

UE - Platform - Mobile - Apr 2, 2019

A user has reported that Refraction does not affect Translucent or Masked materials at all on Android. It is also limited in how much it affects Opaque materials. Regression?: No This has been test ...

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. ...