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

UE - AI - Jul 19, 2018

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

Tools - Jul 19, 2018

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.  ...

Renaming native struct with redirect can break user defined structs

UE - Gameplay - Blueprint - Jul 18, 2018

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 ...

Possible data loss/corruption when loading levels in editor

UE - Gameplay - Jul 18, 2018

Reported behavior: Given Level_A which contains object_X, where object_X references Level_BDeleting object_X causes AssetRenameManger to check if we need to patch up other levelsLevel_B is load ...

Typo in source version of OpenGLWindows.h

UE - Platform - Mobile - Jul 17, 2018

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) ...

Undoing a change to the content of a Text widget while it is still selected causes an assert

UE - Editor - UI Systems - Jul 17, 2018

Hitting undo on a text widget while it is still selected will cause an assert. This appears to happen because the widget loses focus and attempts to commit it's text while still processing the undo, ...

Failure to save after reimport when datasmith actors were moved to sublevel

UE - Editor - Content Pipeline - Datasmith - Importer - Jul 16, 2018

Notice that when you create the sublevel the Cylinder get removed from its parent; and that after reimport, it gets moved back. Not reproducible with Import Datasmith ...

When "Support Material Layers" is Enabled Material Instance Parameter Values Reset to Default Value When Override is Unchecked

UE - Graphics Features - Jul 14, 2018

If "Support Material Layers" is enabled, every time you uncheck an overridden parameter box in a material instance the value of that parameter will reset to its parent's default value instead of sta ...

Importing an Alembic File with "Skip Empty Frames at Start of Alembic Sequence" Enabled Causes Crash

OLD - Anim - Jul 13, 2018

Importing an Alembic File with "Skip Empty Frames at the Start of Alembic Sequence" Enabled Causes Crash. Found in 4.20 Preview 5 CL# 4173640 and 4.21 CL# 4207835 ...

Android + Bluetooth Mouse: Hover events and Get Mouse Position on Viewport not working

UE - Platform - Mobile - Jul 11, 2018

No hover events firing when using a bluetooth mouse on android. Tested with 4.20p5 CL# 4173645 4.21 CL# 4179794 ...