Unreal Engine Issues

iOS Launch-On rebuilds every time

Artifacts from the previous Launch On are being cleaned up, which are necessary for improved iteration time. ...

Spawned particles on the surface of a static mesh in Niagara get offset if the actor is anywhere but the world origin

Particles that are spawned using the surface of a static mesh will be offset from the systems placement in the world unless it is at world origin.  Working as expected in 4.19 CL# 4033788 Found in ...

FQuat::NetSerialize modifies the original value which can cause it to be replicated continuously

FQuat::NetSerialize will always call Normalize() as part of replicating the current value, so that only the X, Y, and Z components need to be serialized (the W can be computed on load). This operat ...

Datasmith Max import- Datasmith reimport Material option missing after reopening UE4

SunTemple crash on load on some iOS devices

This does not occur when attempting to repro using a template code project; testing on the same device. This crash occurred on an iPhone 6, v11.4 (A8) It did not occur on an iPhone X, v11.4 (A11 B ...

Directional Light settings remain from previous level when creating new level when using forward rendering

Using Forward rendering, directional light settings persist across levels and after deletion. Video attached, shows problem in Dev-VR but same issue occurs in Release-4.20 ...

Crash Occurs When Importing a .ABC File as Skeletal Mesh Into Project That Already Contains Asset's Materials

Editor crashes when importing an .abc file as a skeletal mesh and the assets materials already exist inside the project. -Materials need exist inside project before import -If the .abc file is imp ...

[CrashReport] UE4Editor_Renderer!FMaterialShader::SetParametersInner<FRHIVertexShader * __ptr64>() [shaderbaseclasses.cpp:181]

No user comments in crash group 177 ERHIFeatureLevel::Type FeatureLevel = View.GetFeatureLevel(); 178 check(Material.GetRenderingThreadShaderMap() && Material.GetRenderingThreadSha ...

Warnings Log spam when pasting a widget into any panel widget

An increasing amount of warning show up in the output log as a widget is pasted into a name space that is part of a widget that has been added to another widget via the user created section. Examp ...

Crash when exiting PIE after execute demorec command

This issue is regression because it doesn't reproduce 4.18.3. Default level is just the level to move. Demorec level runs demorec command with beginplay and has one replicated variable. UEditorEn ...