Unreal Engine Issues

Editor crashes when a floating window PIE command is issued repeatedly

After assigning Keyboard Shortcut for New Editor Window (PIE) as "F3" and returning to Viewport and selecting "F3" to open New Editor Window (PIE), continuing to repeatedly press F3 results in the e ...

Crash when using Get Start/End Frame (Seconds) node with MovieSceneSection have no opened bound

If use Get Start/End Frame (Seconds) with GetStartFrame has a section isBounded is False, eg 3DTransformSection, editor will be crashed. Specifically, a following code occur crash. inline FFrame ...

Crash when changing details of an animation in an Animation Composite

This is a regression tested in //UE4/Release-4.27 CL#18319896 Fatal error is thrown and the Editor crashes when changing details of an animation in an Animation Composite. ...

Editor crash when modifying Skeletal Animation Section of an unsaved additive animation

Unsaved animations can cause the editor to crash if they are in a sequence, if the sequence evaluates them after an edit.  ...

Float Curve that is set as a local variable in an actor's function is garbage collected when in Standalone, causing a crash

If a Curve Float local variable is created for a function, it will be garbage collected when garbage collection occurs. This causes the process to crash due to an null pointer error whenever it is r ...

Grabbing a Destructible Mesh Child blueprint with a Phsyics Handle crashes the editor

Grabbing a Destructible Mesh Child blueprint with a Phsyics Handle crashes the editor during PIE. NOTE: This issue occurs whether or not simulate physics is active on the destructible mesh compone ...

Memory Leak caused by auto save files

Imported heightmaps with 2x2 sections crash editor

Importing a heightmap with 2x2 segments seems to cause the editor to crash in 3 different instances: 1. Importing the same 2x2 segment landscape a second time after deleting the first instance 2. ...

Changing particle system template via Blueprints crashes Editor and packaged game

Setting a ParticleSystem component in a Blueprint to none/null with a "Set Template" node causes the editor and the packaged project to crash. I have noticed this when migrating my game to 4.22, whi ...

First Person Example Project Crash when character movement component is cast in viewport.

Crash is caused by incorrect cast to display ActorComponent in viewport (gizmo used to move it should not be present) ...