Unreal Engine Issues
Unreal Engine Issues
Performance hitch from RemoveGeometryCache flushing the render thread
UE - Editor - Content Pipeline - Alembic - Jun 12, 2025FGeometryCacheStreamingManager::RemoveGeometryCache calls FlushRenderingCommands which shows up as a hitch when profiling. [Link Removed] Ideally the flush added in CL#23782411 to fix a rare deadl ...
Framerate drops when using SceneCaptureComponents with a RenderTarget in VR
UE - Platform - XR - May 14, 2018Using SceneCapture in packaged VR projects causes poor performance. Also observed with SceneCaptureCube Does not occur in 4.18 ...
Attempting to apply instance changes to blueprint after altering a struct array crashes editor
UE - Gameplay - Blueprint - Dec 14, 2015Editor crashes if a struct array that has been made editable is edited in an instance within the details pane of the level viewport, then the changes are applied from the instance to the base bluepr ...
FFieldPath resolution doesn't handle redirection
UE - CoreTech - Feb 16, 2022A licensee has found that redirectors don't apply to FFieldPath. We should integrate it with the following changes:It needs better error handling (looks like it could infinitely recurse),The change ...
Crash When Curve Editor is on When Animating Button Transform in Widget Blueprint
UE - Editor - UI Systems - Mar 18, 2016In a Widget Blueprint, after animating a button to transform vertically (possibly other directions) with the Curve Editor active, engine will crash upon creating a second animation. ...
Editor crash on close if custom Data Asset is not saved after hot reload.
UE - Foundation - Core - Mar 7, 2016After creating an editor asset of a custom DataAsset class, if changes are made to to the class and hot reloaded, the editor will crash on close if the editor asset is not saved after the hot reload ...
Actor with Camera Component UProperty causes ensure when PIE ends if replicating
UE - Networking - Nov 17, 2015If an Actor with a CameraComponent is set to replicate, ending a PIE session with 2 players will result in an ensure ...
Crash when using "Set Key Time" on an animation key in UMG
UE - Anim - Sequencer - Nov 25, 2015If the user right clicks a key in the animation timeline in UMG and uses "Set key time" the editor will crash. [Link Removed] ...
Attempting to record a demo in PIE causes a crash
When you try to use the console command "demorec" to record a demo in PIE, a crash occurs. Note: This did not occur in 4.8.3 but another crash happened when trying to run the "demoplay" console com ...
Using "RecompileShaders All" while PIE crashes editor with an assert.
UE - Graphics Features - Nov 10, 2016I ran the command with no actual changes to shaders. Recompileshaders global and changed did not crash the editor. ...