Unreal Engine Issues
Unreal Engine Issues
Video material broken on Mac M3+ (sm6)
TM - Rendering - Oct 21, 2025On Mac devices, the video material in the viewport will display incorrectly, appearing stretched significantly. This only seems to affect the viewport and not rendered exports. ...
BlueprintNativeEvents with no return value (void) cannot be overridden in Blueprints.
UE - Gameplay - Blueprint - Dec 22, 2014BlueprintNativeEvents (and BlueprintImplementableEvents) are not available to be overridden in a Blueprint Graph if they do not return a value. This affects both functions present in source code, as ...
Ensures reparenting a child blueprint with a call to parent function in interface function
UE - Gameplay - Blueprint Editor - Oct 10, 2017REGRESSION: Yes, does not occur in 4.17.2 Ensures occur when reparenting a child blueprint that has a Call to Parent Function in a function from a Blueprint Interface. ...
PIE captures mouse when "Game Gets Mouse Control" is disabled
Tools - Oct 31, 2017When entering PIE, the mouse is captured by the viewport regardless of the "Game Gets Mouse Control" setting. Regression: No - Same behavior occurs in 4.17.2 ...
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. ...
Network profiler crash
UE - Networking - Aug 6, 2020Running with the -networkprofiler command line argument can crash the server on the first engine tick in FNetworkProfiler::TrackFrameBegin because the file writer archive hasn't been created yet. ...
Font advance and fallback font metrics have issues in 4.16
UE - Editor - UI Systems - Slate - Jun 5, 2017There were some font regressions in 4.16 that we've since fixed (CL# 3456916 and CL# 3425681). These are affecting live users so we should get them into the next 4.16 build. ...
"Cull Backface" in Cloth Paint is not effective if the back faces are close to the front faces
UE - Simulation - Physics - Character - Jul 6, 2017When Cloth Painting, "Cull Backfaces" is ineffective when the backface is very close to the face that you are painting on Occurs on? 4.16 - 3466753 - YES 4.17 - 3523593 - YES ...
Lighting Channels Do Not Function with 78+ Lights on Actor
UE - Graphics Features - Oct 20, 2017Lighting channels do not function when the number of lights affecting actors is 79 or higher. Any number of lights that is 78 or fewer will honor lighting channel assignments. ...
Transform key don't visible when Import From Animation Root
UE - Anim - Sequencer - Mar 7, 2018Transform key don't visible when Import From Animation Root. This problem happen from 4.17. 4.16 is visible. Case:4.16[Link Removed] ...