FActorPriority::Priority can overflow, resulting in incorrect priority values

UE - Networking - Apr 2, 2019

With large values of delta time, the Priority value in FActorPriority can overflow when using the constructor that takes Time as a parameter. ...

Audio Capture Timecode Provider asserts if no source device can be found.

FLinearTimecodeAudioCaptureCustomTimeStepImplementation::Init() asserts if no source device can be found. It should gracefully fail instead. ...

Scroll bar thickness is unaffected when set below 4

UE - Editor - UI Systems - Apr 9, 2019

Scroll bar thickness is unaffected when set below 4. There appears to be a minimum size in place that prevents the scroll bar from being set to a size lower than 4 ...

One frame difference with an animation controlled by a sequence when an Anim Class is set to none

UE - Anim - Sequencer - Apr 10, 2019

If two skeletal meshes are playing an animation at the same time and one of them has an anim class and the other does not, it appears that the animations will be slightly off from one another. ...

Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21

UE - Graphics Features - Mar 19, 2019

According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...

Movie Scene Float sections do not blend when adding a key

UE - Anim - Sequencer - Apr 10, 2019

Movie scene float tracks to not blend when adding new keys through the add key button if the value comes from outside sequencer. This is a result of a change introduced by CL: 4997300.   ...

LOD of Texture on Static Mesh is selected incorrectly when spawned in Sub-Level loaded by Level Streaming

UE - Graphics Features - Apr 9, 2019

LOD of Texture on Static Mesh is selected incorrectly when spawned in Sub-Level loaded by Level Streaming. This issue does not occur with Editor play, only with Launch or Packaging and Play. Accordi ...

Editor crashes when connecting Eye Adaptation to Base Color

UE - Graphics Features - Apr 11, 2019

This problem occurs when we use the Eye Adaptation node for calculations. Also, it does not seem to happen in 4.21. ...

When launching from Mac to iOS, the process does not end normally, so the second and subsequent application launches from the iOS device are not performed properly

UE - Platform - Mobile - Apr 16, 2019

If you deploy the app to the iOS device using the Mac editor's Launch button or Project Launcher, the second and subsequent launches will fail. The following message is output when startup fails. T ...

Niagara Ribbons using Two Sided materials are incorrectly lit

UE - Niagara - Apr 15, 2019

Two Sided materials are lit incorrectly on Niagara ribbons. The sides will be flipped of how they should be. ...