Hot reload causes placed actor to lose variable references

DevTools - Hot Reload - Nov 9, 2017

Preforming a hot reload causes placed actors to lose code based variable settings. More repro steps: 1. Open UE4Editor.exe 2. Create a First Person Code project 3. Build the project for Developme ...

UMG Background Blur renders black on Android

Platform - Mobile - Dec 8, 2016

Tested on Nexus 6P with Android 7.0 Suggest that on mobile the background is not rendered in real time, instead we render the blurred image for one frame and use that same image for subsequent fr ...

Niagara Particles don't work with Instanced Stereo Rendering enabled

Rendering - Niagara - Jul 13, 2018

With Instanced Stereo enabled, CPU Niagara particles are not visible, GPU Niagara particles render in left eye only. ...

VSCode finds intellisense errors in Project source files: cannot open source file "UBT_COMPILED_PLATFORM/UBT_COMPILED_PLATFORMPlatformCompilerPreSetup.h"

DevTools - Jan 28, 2020

VSCode finds intellisense errors in Project source files: cannot open source file "UBT_COMPILED_PLATFORM/UBT_COMPILED_PLATFORMPlatformCompilerPreSetup.h" Similar to [Link Removed], but that was onl ...

Actors in sublevels do not replicate to Clients after Seamless ServerTravel

Networking - Dec 9, 2015

Actors in sublevels do not replicate to Clients after Seamless ServerTravel. The user reporting this noted that "[...] UNetDriver::IsLevelInitializedForActor() keeps returning false even when the ac ...

Crash after setting material of Text Render actor to an instance of the default material

Rendering - Jul 15, 2020

Setting the material of Text Render to an instance of the default material then running as in Standalone results in a crash. ...

Assertion Failed AsyncLoading.h on launch of a Dedicated server built from the First Person Template

Networking - Mar 9, 2017

Using the first person template to build/compile/package a dedicated server causes the server to assert shortly after launch. This assert does not occur when building a dedicated server from a thir ...

Linked animation graph doesn't trigger anim notifications on dedicated server.

Anim - Jun 15, 2020

Linked animation graph doesn't trigger anim notifications on dedicated server. There is no expected message in log: LogBlueprintUserMessages: [HitReact_AnimBP_C_0] Client 0: HitNotify IsServer: tru ...

Use of SpiralBlur-SceneTexture MaterialFunction in translucent material results in compile errors

Rendering - Features Teams - May 8, 2020

This appears to be new in 4.25. ...

Mobile VR - Foliage (HISM) crash

XR - Jun 7, 2019

HISMs cause mobile VR app to crash. Confirmed in 4.23 MAIN @ CL 6829265 ...