Unreal Engine Issues

SwarmCoordinator.exe is missing from binary build

When using a NavModifier with a NavBoundsVolume being in a SubLevel, unloading the level causes a crash.

When repeatedly loading and unloading sublevels with a NavBoundsVolume, it will cause a crash when using a NavModifierVolume. When the NavMesh is unloaded, it seems that the number of the DirtyLayer ...

Subtractive Geometry Brushes All Show a + In The World Outliner

Subtractive Geometry Brushes All Show a + In The World Outliner. Works as expected in 4.19 CL# 4033788 Found in 4.20 CL# 4213847 and 4.21 CL# 4221482 This is a regression.  ...

Arrays on multicast events called from the server are not passed to clients

Arrays that are passed into a Multicast Event as an input are not available on clients who call the function Regression?: Yes This did not occur in 4.19.2 ...

Renaming native struct with redirect can break user defined structs

From https://udn.unrealengine.com/questions/444690/redirecting-ustruct-used-as-member-of-userdefineds.html In 4.20 it was changed so soft object ptrs pointing to classes work correclty with +ClassR ...

'Get Tangent at Distance Along Spline' returns incorrect values compared to 'Get Location and Tangent at Spline Point'

The "Get Tangent at Distance Along Spline" node returns incorrect tangent values compared to "Get Location and Tangent at Spline Point", where the spline point is at the same distance along the path ...

Asset values change when the Editor is out of focus when using Maya or Web Browser

When switching between any open software (Maya, web browser) and UE4 while Simulation is running, sometimes the values change on the asset and it starts to oscilate between <-0.6,0.6> or any other s ...

Setting collision enabled on a primitive component fails if the owner's collision is disabled

Attempting to edit the "Collision Enabled" setting of a primitive component while the owner's collision is disabled results in no changes. Regression?: No This occurs in 4.18 ...

Typo in source version of OpenGLWindows.h

The type definitions for the Enum Macros glObjectLabelKHR and glObjectPtrLabelKHR are misspelled. Working in 4.19.2 Broken in 4.20 Tested 4.19.2 (CL - 4033788) and 4.20 (CL - 4214897) ...

Character actor with simulated physics using an Anim Instance blueprint does not preview when scrubbing through sequencer timeline

A character actor using an AnimInstance blueprint will not update in editor when scrubbing ...