Unreal Engine Issues
Unreal Engine Issues
Setting multiple identical actors to replicate movement will crash on PIE with multiple players
UE - Networking - Jan 28, 2015If ten or more of the same actor in a level have the "replicate movement" checkbox set to true, the editor will crash on PIE if the number of players is set to 2 (or with 1/2/3 players if dedicated ...
Updates to DesiredFocusWidget for a UserWidget are not propagated to existing instances of it inside the WidgetTree of other widgets
UE - AI Workflows - UI Systems - Nov 17, 2025This issue has been reproduced in UE 5.3 to 5.7 and source versions. A repro project is available. Below are the findings from an initial investigation of the problem. Normally, when a UserWidget p ...
Adding "_API" specifier to FMovieSceneTrackEditor results in linker errors
UE - Anim - Sequencer - Feb 7, 2017Unable to add API specifier to FMovieSceneTrackEditor, results in compile errors (pasted in the callstack field) ...
Collision build of LiDAR point cloud assets at runtime does not apply
UE - Editor - Content Pipeline - Datasmith - Oct 24, 2023Collision build at runtime for LiDAR point cloud does not apply. This applies to Editor and Standalone. If you do not allow collision builds at runtime, this module should not be available at runtim ...
Character No Longer Able to Use Nav Link After NavMesh Update
UE - AI - Feb 10, 2017Causing a Nav Mesh update, such as by moving an actor into the NavMesh that will create a hole, seems to be breaking Nav Link Proxies by preventing characters from being able to use them. ...
Extreme hitching when using profile command (stat startfile) + other stat commands
UE - Foundation - Core - Apr 19, 2018Running the "stat startfile" command in a 4.19 project causes constant editor hitching. Running the same command in a 4.18 project does not produce any hitching by comparison. ...
NavMesh generation should not care for Actors that are hidden in the Editor.
UE - Runtime - Character - Aug 5, 2025The problem is that the Cube is still loaded but "HiddenEd". It's AActor::bHiddenEdLayer property is set to true by the WorldPartition System. The Actor is dirty which makes the WP system pin it (wo ...
Engine Scalability view distance settings are not being reflected accurately in the viewport
UE - Graphics Features - Jan 30, 2017The foliage in the map appears to be unaffected by the changes in view distance. The scalability settings are changing the cvars to the right values but the change is not being reflected on screen ...
Gamepad continues to control editor menus during Mobile PIE session
Tools - Dec 4, 2017When using a Gamepad, there is an issue where input from the controller continues to control editor menus during Mobile PIE session. This issue does not a appear to be a regression. Versions Tested ...
Loss in Specularity on Skin Shading when Shadowed by Indirect Capsule Shadows using r.sss.checkerboard 0
UE - Graphics Features - May 23, 2017A licensee is reporting incorrect or over exaggerated loss of specularity on the Subsurface skin shading model when shadowed by indirect capsule shadows, and then modifying the r.sss.checkerboard se ...