Unreal Engine Issues

Failed to package for IOS on PC with BuildGraph

Volumetric Lightmap Holes Appear Every Fifth Build

Volumetric lightmap holes appear every fifth build.  Found in 4.19 CL# 4033788, 4.20 CL# 4302132, and 4.21 CL# 4348893 ...

Select All Descendants in World Outliner Does Not Highlight Everything Selected in Sub Folders

Selecting all descendants of a folder hierarchy in the world outliner doesnt accurately show what all is selected. This does not always occur and is a visual bug. The items in the level are still se ...

Actors in TMap Blueprint Properties are not copied properly for PIE

Actors that reside in TMap blueprint variables refer to the Editor actors not the copied UEDPIE actors (that we'd expect) when accessed in PIE. This is not the case in standalone; this only occurs f ...

Unimplemented Simplygon function causes empty mesh LODs and crashes

When we do the refactor for MeshDescription we miss the staticmesh reduction project settings option and change only the quadric reduction. There are two possible fixes for this issue: 1. Implemen ...

Project cannot build in VS 2017 15.8+ if it uses std::make_shared with an over-aligned type

Visual Studio 2017 15.8 includes a fix to properly handle std::make_shared used with over-aligned types. However, this is a breaking fix and requires the definition of one of two macros to either ac ...

Sprites/Flipbooks only render in left eye with Instanced Stereo Rendering enabled

Paper2D sprites render only in left eye with Instanced Stereo enabled. Also confirmed in Main CL 4329255 ...

Crash caused by Buffer Overread in TBitArray operator < function

A licensee has reported a crash that is caused by a Buffer Overread in TBitArray's operator < function. While the licensee did not provide reproduction steps, the crash is apparent from looking at t ...

Memory Leak In PageAllocator When Packaged

There is a Memory leak in PageAllocator when packaged. The leak can be stopped if "Landscape.Static" is used in console. Unable to test 4.19 since the provided project was 4.20, but Issue is reporte ...

Shift + Leftclick selection not working in World Outliner

The Shift + Leftclick selection range appears to break when selecting something in the World Outliner first followed by clicking something in the Viewport and then shift selecting a range back in th ...