Child Actor component is duplicated in Standalone Game

UE - Gameplay - Jan 12, 2017

Child Actor component is duplicated in Standalone Game. No other play modes or packaged game are affected. The additional actor will disappear after 1 minute. *This is a regression: Doesn't occur ...

Set All Bodies Below Simulate Physics Only Causes Ragdoll Effect if it is Set to Root Bone

UE - Simulation - Physics - Sep 29, 2017

-This functions in 4.16 -Physics will only simulate if the Third Person Character bone name variable is set to root -Physics does not affect any other bone -Make sure to plug in set in collision f ...

Performing a Clean on a project using a binary Engine installation on Mac removes some Engine .dylib files

UE - Foundation - Core - May 17, 2018

When a Clean is performed on a code project that uses a binary Engine installation on a Mac, some of the Engine's .dylib files are removed during the Clean process. A Clean process for a project usi ...

Subsurface materials display dark lines in the middle of the viewport

UE - Graphics Features - Dec 8, 2017

AMD gpus are displaying an issue with subsurface materials. Dark lines appear on the material that run through the middle of the viewport, (See screenshot attached). This was seen on AMD drivers 17. ...

Play Rates are not reverted when HAP Media Plugin is disabled

Media Framework - Nov 11, 2019

Enabling the HAP Media player plugin permanently affects the thinned Play Rates of the Media Player asset. Tested in 4.23.1 (CL - 9631420), 4.24.0 (CL - 10091930), 4.25 (CL - 10091038) ...

MoviePipeline skipped frames using Temporal Subsampling + Time Dilation

UE - Anim - Sequencer - Jun 30, 2020

The frame appears to be getting skipped entirely, but the timing for the frames on either side of them is correct, ie: if frame 10 is skipped, frame 9 and 11 still match the working case, so the ove ...

Error when exporting OBJ unattended

UE - Editor - Content Pipeline - Import and Export - Dec 1, 2020

When doing an unattended OBJ export with python. The export will fail and give the atteched callstack. ...

Incorrect WorldType causes crash in ULandscapeSplinesComponent::CheckForErrors

UE - LD & Modeling - Terrain - Landscape - Jun 21, 2018

When adding a sub-level that contains a Landscape and Landscape Splines to an existing Level, it will cause a crash when building the lighting.  This issue was reported in 4.18.3 (CL 3832480) and t ...

Crash compiling Widget Blueprints that contain Dynamic Entry Boxes with their Entry Widget Class set to each other

UE - Editor - UI Systems - Jun 10, 2020

Currently the Dynamic Entry Box has no protection against recursion, leading to a stack overflow and a crash. This issue was reported and tested in 4.25 (CL-13144385). This was reproduced in 4.24.3 ...

Swapping between Multiple Cloth Skeletal Meshes and Animation Classes in a Character Blueprint causes the Engine to crash

UE - Simulation - Physics - Aug 2, 2018

When changing Cloth Skeletal Meshes and Animation Blueprints on a Character it will cause the Engine to crash during PIE. This is a regression from 4.19.2 (CL-4033788) as it was working as expected ...