Crashes upon project start up

Tools - Feb 10, 2015

Crash Report: [Link Removed] After downloading latest revision, user is no longer able to open project due to constant crash. ...

Crash when placing a widget into a nested name slot that has been added via the user created section

UE - Editor - UI Systems - Jul 28, 2016

Crash when placing a widget into a nested name slot of another name slot. This occurs if this widget is then added to another widget and both the parent name slot and the child name slot receive chi ...

Cross building UE4Editor from Windows to Linux has incorrect runtime dependencies on DSO's

UE - Platform - Linux - Jan 23, 2019

Editor that was cross-built on Windows reportedly cannot start (using a Windows Subsystem for Linux or a VM). ...

Datasmith Export Bug with Camera Target

UE - Editor - Content Pipeline - Datasmith - Exporters - Mar 7, 2025

Potential bug was encountered when exporting vray cameras and their targets that have been path-constraint to corresponding splines. The resulting export file shows no camera targets; hence, missing ...

Lighting behavior is unreliable for translucent lit materials, results are inconsistent depending on the editor camera's FOV and the editor viewport's width/height/aspect

UE - Rendering - Architecture - Oct 27, 2024

When working on the level editor viewport or testing on PIE, the visual appearance of additive/translucent lit materials changes significantly (and abruptly) when varying the camera FOV or the viewp ...

Editor crashes if an interface array variable is reset in the Detail's Pane

UE - Gameplay - Blueprint - Apr 27, 2016

The editor will crash if an array of interfaces is reset using the "reset values" button (yellow arrow) in the Detail's Pane of the editor. Frequency: 4/4 Crashreporter: N/A Regression? (No), is ...

Sync'ing an asset through the editor does not update the asset until the project restarts

If an asset file is checked out / edited in source control and checked back in, others will see the yellow exclamation mark to indicate that there is an update to the asset but choosing to sync does ...

Niagara: MeshParameterBinding property of the StaticMeshLocation module does not accept binding to parameters of type StaticMesh.

UE - Niagara - Jan 22, 2026

On the details panel of the StaticMeshLocation module, when expanding the dropdown of the MeshParameterBinding property, user parameters of type StaticMesh don't show up (only those of type "Object" ...

"Active" marker on shot track scales improperly when using Time Scale

UE - Anim - Sequencer - Apr 21, 2017

"Active" marker on shot track scales improperly when using Time Scale ...