Deactivate Then Activate Ribbon Emitter Causes Flicker

UE - Graphics Features - Oct 21, 2016

When setting a particle system to be active after deactivating the remaining particles still floating in the air from earlier will flicker. This is harder to reproduce when smooth frame rate is enab ...

MAC: Drop Down Menus Continuously Flicker (In Certain Conditions)

UE - Editor - UI Systems - Slate - Nov 4, 2015

Shown in the Behaviour Tree Graph, if the Dropdown menu's length exceeds the Behavior Tree Graph window, the menu will try to offset it's position in order to display all information and will flicke ...

Crash when loading the tutorials for 'Landscape Painting Mode' and 'Landscape Sculpting Mode'

Tools - Jun 6, 2017

A crash occurs when starting either the Landscape Painting Mode or Landscape Sculpting Mode tutorials. It crashes even if a landscape is already in the level. This is similar to [Link Removed], h ...

Fatal error when pausing and sleeping when using Launch Windows Game

UE - Graphics Features - Nov 13, 2017

When using the pause command in a launched game and putting the computer to sleep it causes the fatal error "GameThread timed out waiting for RenderThread" when logging back in and resuming work on ...

Blueprint iOS apps are named UE4Game.ipa

UE - Platform - Mobile - Jun 4, 2018

In 4.19 blueprint-based apps are named after the project name, but in 4.20 they are all called UE4Game.ipa This doesn't reproduce when packaging for Win64 or the apk for Android. The installer bat ...

Scrollbox widget moves much slower when using a gamepad

UE - Editor - UI Systems - Aug 1, 2018

Using the gamepad to scroll a scrollbox causes the scrolling to move slower. Tested in 4.18.3(CL - 3832480), 4.19.2 (CL - 4033788), 4.20.1 (CL -  4233996), 4.21 (CL  - 4245542) ...

Hierarchical Instanced Static Mesh Component Doesn't Update Instance Transforms In Standalone Window and In Packaged Game.

UE - World Creation - Worldbuilding Tools - Foliage - Aug 4, 2018

The Hierarchical Instanced Static Mesh Component doesn't update instance transforms in Standalone window and in Packaged game. Working as expected in 4.19 CL# 4033788 Found in 4.21 CL# 4233996 and ...

Crash upon selecting CameraComponent in Sequencer when level is locked

UE - Anim - Sequencer - Aug 14, 2018

Selecting a Camera Component in the Sequencer window when the level is locked causes the Engine to crash.  This was reported and tested in 4.20.1 (CL-4233996). This was reproduced in 4.19.2 (CL-403 ...

Geometry asset is tiny when importing a .udatasmith file from 3DS Max 2019

UE - Editor - Content Pipeline - Datasmith - Exporters - Sep 27, 2018

The user set up 3DS Max for centimeters and didn't do any pivot rotation. When exporting with the FBX the results are fine, but with DataSmith it is tiny for the actual geometry. This issue was re ...

Reset To Defaults in Editor Preferences Graph Editor does not work consistently

Tools - Nov 7, 2018

The Reset to Defaults button in Editor Preferences does not reset all the properties to their default values. Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4543149), 4.22 (CL ...