Unreal Engine Issues

Pasting an instanced subobject property into a Blueprint prevents that Blueprint from being added to level

Copying and pasting an array of nested instanced subobjects from a level instance into a Blueprint's defaults and adding that Blueprint to the level will prevent the actor instance from saving. ...

[StateTree] Reentering current state immediately after exiting does not reset variables on tasks with "Should State Change on Reselect"

Context State Tree Tasks have a configurable default value 'Should State Change on Reselect' which controls whether the task receives a EnterState/ExitState if completion of the current state is fo ...

Duplicate subobjects when you attach to an OptionalDefaultSubobject

I believe that this is happening because of a problem within USubobjectDataSubsystem::FindOrCreateAttachParentForComponent where it is creating duplicates of the character mesh because the "TestScen ...

VC Runtime not in UnrealLightmass temp directory; causing lightmass build errors

A Redistribute file for VS 2015 is needed to build lightmass, but this is not currently included with the engine. If a user does not have VS 2015 installed, lightmass will fail with this error: Un ...

Collision Boxes not set properly when using negative values

When using multiple collision boxes with the mesh scaled in a negative axis while the collision boxes are rotated that the rotation is not taken into account when using the negative scale. ...

Editor will crash when Blueprint Details Panel is dragged across the Event Graph

When dragging the Details Panel in a Blueprint across the event graph the editor will crash. [Link Removed] ...

FPackedRGBA16N is divide by 32768 twice in NEON/FPU

Editor crashes if Timeline Play Rate node is copied/pasted in blueprints

Editor crashes when Timeline Play Rate node is copied/pasted. Frequency: 2/2 Crash Reporter: [Link Removed] Callstack: MachineId:4E82586D46B558EA69EF0EAA821297B1 EpicAccountId:1558531203f84e81 ...

Collections reset when the engine upgrades project

When you upgrade your project to a new version of the engine, your Collections are deleted from the Collection setting. ...

D3D HUNG crash - FD3D11DynamicRHI::RHIReadSurfaceFloatData()

This is one of the widespread D3D Hung crashes that have existed since 4.14. This particular callstack has affected around 300 users. The issue has been successfully reproduced on a home PC. Dxdi ...