Using more than a single break node disables fast path

Anim - Mar 7, 2019

Using more than a single break struct node in sequence (despite no break nodes performing calculations) disables fast path. Splitting structs instead does not cause this issue. ...

Gamepad input affects multiple game instances at once, due to not needing focus.

Tools - Slate - Mar 5, 2019

Since Gamepad input works without needing focus (which was added in 4.9 with UE-14030), a Gamepad's input will also affect all instances running on the same computer. Regression?: No This occurs in ...

Performance drop in Orthographic views when Visualize->Volumetric Lightmap

Rendering - Ray Tracing - Mar 4, 2019

Severe performance drop when when entering Orthographic view, but only when Volumetric Lightmap is selected. ...

UWorld::CleanupWorld causes issues with sublevels when changing maps after building lighting

Tools - Mar 1, 2019

A licensee has reported that UWorld::CleanupWorld is causing issues with assets in Sublevels if you build lighting on the parent level, save all of the maps, and then change to another level. The as ...

Creating a new C++ Basic Code Project, based upon a deleted With Starter Content enabled

Tools - Feb 28, 2019

Upon creating a new C++ Project called "MyProject" with starter content enabled, if you delete the project folder from the finder, then re-create a new C++ Project under the same name "MyProject" wi ...

RepLayout can hold onto hard references to owning objects, preventing them from being destroyed.

Networking - Feb 28, 2019

RepLayouts are associated with an Owning Object, which may be a Class, Function, or Struct. RepLayouts will only be cleaned up when the Owning Object is no longer valid. RepLayouts hold references t ...

CCD can produce incorrect results at low frame rates

Physics - Feb 27, 2019

The attached project has a fixed frame rate of 30fps with a simulating CCD cube above a with a full restitution floor. The cube has an odd rotation, such that it impacts the floor at a single point ...

Moving .uassets that were imported from a source file with Source Control active moves the source file without marking for add

Tools - Feb 26, 2019

A licensee has reported an issue with Perforce source control integration. The issue is related to the source file for an asset that was imported into the editor. If this source file is also checked ...

Crash When Setting a Bool in a Niagara Parameter Collection via Blueprint

Rendering - Niagara - Feb 26, 2019

The Editor will crash when setting a bool in a Niagara Parameter Collection via Blueprint. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5159901, 4.23 CL# 5194133 ...

Orientation setting does not respect user's settings on Android

Platform - Mobile - Feb 25, 2019

The Orientation setting in the editor for Android phones does not respect the user's settings. Despite "Auto-rotate" being turned off, the orientation of the UE4 app will change if it is set to do s ...