Unreal Engine Issues
Unreal Engine Issues
For a TMap with C++ enum keys, deleting and re-adding a map entry in the Editor can corrupt the map data.
UE - Editor - Jul 19, 2024When adding an entry to a TMap using UE's property editors, in most cases the new entry comes with a default-initialized key (if such key already exists, the insertion fails). The case of a UENUM de ...
Changing the ComponentClass of a ACharacter twice and trying to set a SkeletalMeshAsset crashes the engine
UE - Runtime - Animation - Jan 22, 2026Changing the ComponentClass of a ACharacter twice and trying to set a SkeletalMeshAsset crashes the engine with a "Cannot replace existing object of a different class" message. The conditions to re ...
Ensure triggered inside Range Struct Customization when Property Node is no longer valid (e.g. when editing FFloatRange while FRuntimeFloatCurve editor is visible) [Ref. UE-341339]
UE - Editor - Verse Class Editor - Nov 12, 2025[Link Removed] Closed was fixed by CL 46990575, successfully avoiding an ensure condition inside FIntervalStructCustomization::S ...
Saving a Slate Vector Art asset causes a crash
UE - AI Workflows - UI Systems - Mar 17, 2022Saving a Slate Vector Art asset causes a crash. ...
Load String fails to load when launched onto a mobile device
UE - Platform - Mobile - Mar 1, 2016If the user uses the node load string and then launches onto a device than the web browser will be blank. Note: This node appears to work fine in editor ...
Spin box does not receive input in mobile preview
UE - Editor - UI Systems - Sep 9, 2015When using a spin box in mobile preview, the spin box does not appear to update. It will highlight when the mouse is over it but clicking and dragging will yield no value changes. ...
Cannot click buttons in the upper left corner when using PIE
UE - Editor - UI Systems - Feb 27, 2015The click for mouse control button overlaps the upper left corner making it hard to click buttons in the upper left corner when using PIE. The button to give mouse control take priority. ...
Text box events (OnTextCommitted and OnTextChanged) are throwing false warnings
UE - Editor - UI Systems - May 11, 2015If the user creates an OnTextCommitted event or an OnTextChanged event the user will receive a warning upon compiling the blueprint. Warning received: Warning No value will be returned by referenc ...
Changing ColorAndOpacity in Text using AutoKey do not create new keyframe.
UE - Anim - Sequencer - Feb 7, 2017This is not reproduced in Shadow Color section. Since ShadowColorAndOpacity is FLenearColor and ColorAndOpacity is FSlateColor, this prevents adding new keys in ColorPropertyTrackEditor.cpp FColo ...
OnPaint function causes artifacts to show up in a New Editor window
UE - Editor - UI Systems - Jun 17, 2015If the the onpaint function is used it can cause the top and left sides of the screen to retain artifacts. Attached image for reference. ...