Niagara Memory Leak in vertex buffer when increasing particle spawn rate on CPU sims

UE - Niagara - Jul 16, 2019

Increasing the spawn rate of a CPU particle sim will cause a memory leak in the vertex buffer.  ...

A Niagara system will only use one spawn rate curve when it has more than one emitter with different spawn rate curves

UE - Niagara - Jul 19, 2019

Systems that have more than one emitter that both have unique spawn rate curves will only used the most recently added emitter's spawn rate curve for all emitters. ...

Particles can not be displayed once they disappear in ParticleLOD

UE - Niagara - Jul 22, 2019

I have attached a project to reproduce. [Link Removed] The problem is that if there are multiple emitters It seems to reproduce when all Emitter is Disable. It works well if there is one Enable. [ ...

UWorld Async Sweep functions missing the FQuat parameter

UE - Simulation - Physics - Jul 22, 2019

The UWorld Async Sweep functions are missing the FQuat Rot parameter of their sync counterparts and the Sweep, Overlap, and Async Overlap functions are missing param comments for their rotation para ...

MediaPlayer seek function goes to incorrect timecodes on Android (Oculus Quest)

Media Framework - Jul 23, 2019

Calling Seek() on video consistently jumps to the timecode which is the nearest lower multiple of 2 seconds from the input timecode. ...

Editing sub-components of an instanced blueprint will lose selection of current property value after pressing enter

UE - Gameplay - Jul 24, 2019

Result of pressing enter when editing text in a subcomponent (of an actor that exists in world) has different behavior than elsewhere in the editor. Confirmed in 4.24 MAIN @ CL 7519848 ...

ARSharedWorld, AREnvProbe, and ARSaveLoad fail to build for iOS with clang error

UE - Platform - Mobile - Jul 18, 2019

ARSharedWorld fails to package at the build command for iOS with the following messages. Packaging (iOS): [1/4] sh /Volumes/Storage/Workspaces/Release/Samples/AR/ARSharedWorld4.23/Binaries/IOS/ARS ...

Error during packaging if nativizing a blueprint that contains a TMap with a UserDefinedEnum as a key

UE - Gameplay - Blueprint - Jun 17, 2019

Certain Map container calls (e.g. Find, Add) will fail to compile at packaging time if a Blueprint class containing a Map variable with a user-defined enumeration as the key type is nativized. This ...

Windows Mixed Reality Controllers do not show up in Collab Viewer

UE - Content - Engine - Jul 29, 2019

When using Windows Mixed Reality with the new collab Viewer template the headset will track but the controllers do not show up. ...

Apple TV offline saves fix

UE - Platform - Mobile - Jul 31, 2019

Offline save games don't work on Apple TV, (in fact all file operations fail) because Apple has decided that you can't store anything in the NSDocumentDirectory anymore. The fix is to replace occurr ...