Unreal Engine Issues
Unreal Engine Issues
Crash when using CastChecked<>(nullptr, ECastCheckedType::NullAllowed) in configurations where checks are disabled
UE - CoreTech - Jun 19, 2025When using CastChecked<>(), the second parameter can be passed as ECastCheckedType::NullAllowed to make the check succeed when the input is nullptr. However, in UE 5.5 up to the latest engine versio ...
Allow custom code and related blueprints to be migrated from one project to another.
UE - Gameplay - Blueprint - Mar 22, 2016Currently, after migrating a blueprint that is based on a code class to a new project, the blueprint breaks due to unknown parent ([Link Removed]) Migrating & copy/pasting the code along with the b ...
Adding a variable named "Class" causes Get Class Defaults node to appear to select input pin when dragging off output pin
UE - Gameplay - Blueprint - Apr 13, 2016If a class variable is given the name "Class", creating a Get Class Defaults node and setting Screenshot provided by user in AH post ...
Packaging failed with disabled plugin
UE - Foundation - Cpp Tools - Oct 9, 2018Disabling any plugin causes packaging failure. No repro in 4.19 Also occurring when Disabling all platforms except for windows and changing configuration from development to shipping. ...
Particle System check for IsActive in Blueprints does not reset
UE - Graphics Features - Jan 4, 2016When using a particle system in a blueprint and then moving the particle system off screen and then back on there is the node "Is Active" that can check to see if the Particle is still active. When ...
Screen Probes and Specular Firefly Flickering near screen edges
UE - Graphics Features - Lumen - Aug 6, 2024Lumen's rough specular indirect lighting buffer can have fireflies along the bottom and right edges of the screen. Also tested in //UE5/Main, CL: 35177423 ...
Opening Floating Editor Window Locks Camera to Upward Position
Tools - Jan 19, 2016Using the shortcut "Ctrl + E" to open the static mesh editor in it's own floating window results in the camera locking in the upward position in the Main Viewport (*not* the viewport of the Static M ...
[Audio Capture] - Editor crashes when activating an Audio Capture component when there are no active input or output devices avilable
UE - Audio - Aug 12, 2022If a device has no available input or output devices, activating an Audio Capture component will cause the device to crash. Occurs in Editor and Runtime. Assertion failed: NumTotalFrames > 0 [File:E ...
UV Import layout error increases with movement of UVs away from 0-1 Space
Tools - May 27, 2015When a user sets up an unwrap using a space outside the original 0 to 1 space the unwrap will increasingly show errors of positioning. For Example, in the following images the lower left vertex of ...
Unexpected vertex normal orientation when manipulating some morph targets
OLD - Anim - Jul 19, 2016Unexpected vertex normal orientation when manipulating some morph targets. This may be related to [Link Removed], but felt different enough to enter on it's own. ...