Unreal Engine Issues
Unreal Engine Issues
Component default data can be lost for a non-nativized Blueprint class that inherits the component from a nativized parent Blueprint class.
UE - Gameplay - Blueprint - Sep 5, 2018This is a regression that was introduced by the fix for [Link Removed]. The fix makes an invalid assumption that instances of components whose archetypes are inherited by a non-nativized child Blue ...
UUserWidget::NativeDestruct may be called on a preview widget if PIE is started while the widget needs compilation
UE - Editor - UI Systems - Jun 4, 2018By starting PIE while an uncompiled widget is open in the widget editor, it's possible to trigger a call to NativeDestruct on the preview widget. This is especially dangerous because NativeConstruct ...
Memory-only FMOD assets cause 'unable to find cached package' spam in log
UE - Foundation - Core - Cooker - Jan 23, 2017When loading individual events/sounds in an FMOD bank file, the cook will emit a warning for each asset which pollutes the log file with superfluous messages. This is because the actual event/sound ...
Sockets are scaling with imported transformation and passing scaling to attached
OLD - Anim - May 4, 2015When Skeletal Meshes are imported with a uniform scale, the attached socket will take these scales and pass it along to any object attached to the socket. This is particularly obvious for users who ...
FDetailGroup::AddGroup does not correctly apply the default expansion state for DetailGroups
UE - Editor - Verse Class Editor - Feb 10, 2026There is a bug affecting DetailGroups in the engine. When adding child DetailGroups to a parent DetailGroup, the expansion state does not behave as expected and ignores the flags intended to control ...
Constraints are broken when capsule component height changed
UE - Simulation - Physics - Jul 20, 2015James: I think we currently recreate the capsule body when you change dimensions, should just change the shape instead. – DisableCollision is reset if constrained Capsule Component height is change ...
Linear Spline Point Type doesn't distributed over a linear value
Tools - Nov 3, 2015Linear Spline Point Type doesn't have expected result User Description: I was following a tutorial from Dokipen (Tutorial) about using spline to create linear arrays. Everything is working fine f ...
Add Point node used with an InputKey of 0 or 1 will crash the editor on bp compile
Tools - Nov 29, 2016Add Point node used with an InputKey of 0 or 1 will crash the editor on bp compile User Description: Unreal version 4.14 crashes every time that you use spline component and try to add the point 0 ...
Particle System Components don't inherit owner's time dilation
UE - Niagara - Feb 7, 2020This is a regression introduced by the particle system manager. It does not account for the owning actor's time dilation when ticking the particle system components. ...
Slow while replacing actor in large open world
UE - Core - Editor Performance - Nov 8, 2022Licensee: "Content creators from my team have reported that when they replace actors in an open world it can take more than 10 seconds. This is with several thousand actors loaded in the world. On m ...