Unreal Engine Issues
Unreal Engine Issues
Packaged Game Crashes When Launched with the -dx12 for Ray Tracing Features and PixelStreaming enabled
PixelStreaming - Apr 3, 2019Packaged game crashes when launched with the -dx12 option and PixelStreaming is enabled. Found in 4.22 CL# 5660361 and 4.23 CL# 5704223 ...
Refraction of Ray Traced Translucency in Path Trace View is Incorrect
UE - Graphics Features - Lumen - Apr 8, 2019Refraction of Ray Traced Translucency in Path Trace View is Incorrect. Found in 4.22 CL# 5660361 and 4.23 CL# 5779284 ...
Black Lines on Meshes with Ray Traced Global Illumination Enabled
UE - Graphics Features - Lumen - Apr 22, 2019Black Lines on Meshes with Ray Traced Global Illumination Enabled. Found in 4.22 CL# 5660361 and 4.23 CL# 6037269 ...
Crash when trying to open a widget after upgrading project
UE - Foundation - Core - Jul 1, 2019A user is experiencing a crash after upgrading their project from 4.21 to 4.22. This crash did not occur in the 4.21 version of the engine. [Link Removed] ...
There is a moment of T pause when Post Roll Frames is enabled and snapping is enabled
UE - Anim - Sequencer - Apr 19, 2021When I turn off snap, the problem does not occur The problem does not occur in 4.24.3 and 4.25.4 Occurs in 4.26.2 and UE4main ...
Rotator visual helper appears in local Presentation exports
TM - Tools - Nov 6, 2025Reported in SF [Link Removed] The Rotator animator's visual helpers will be visible in locally exported Presentations when it should be hidden. This does not affect the Translator animator. ...
Crash launch application adding .umap url
UE - Foundation - Core - Aug 6, 2020The application crashes when adding ".umap" to the launch map at application launch. If not specify ".umap", it will be able to launch application. There appears to be a failure to parse the URL. Th ...
Fire tower lights do not change when held down in StrategyGame on iOS
Docs - Samples - Aug 18, 2016The fire tower charge effect is not working correctly on iOS. This was tested with an iPhone6S_6240 OS: 9.3.2 Does not occur on Android. Tested on Galaxy S7 ...
Joystick is missing from projects on certain iOS devices
UE - Platform - Mobile - Jan 11, 2017The Flying template is not displaying joysticks when deployed to iOS. Issue does not occur in: 4.14.3 - 3251583 Phones tested that have not experienced the issue: iPhone 6S_6240 ...
Low Frequency Crash when rendering a movie in Sequencer
UE - Anim - Sequencer - Feb 10, 2017Note This is a low frequency 1/3 times attempted. I could not accurately reproduce this crash. Based on crash reporter, this never happened in 4.14 so this is a regression ...