Unreal Engine Issues
Unreal Engine Issues
Cook Non-Determinism in USplineComponent
UE - Editor - Feb 25, 20261. Non-Deterministic LastAuthority Serialization LastAuthority is assigned in USplineComponent::Serialize. Its value depends on the order in which the object and its archetype are serialized, leadi ...
Drag and drop does not work from a window created with PySide
UE - Editor - Feb 5, 2026The cursor position is no longer updated during drag and drop, so drag-over events cannot respond correctly. Commenting out the following code in WindowsCursor.cpp works as a workaround ( the behavi ...
In the level editor, when configuring a component that is part of an actor blueprint, adding entries to a TMap with C++ enum keys results in duplicate keys and an incorrect warning popup.
UE - Editor - Jan 22, 2026Note: This started happening in UE 5.4 and persists up to latest. It is probably related to [Link Removed] Closed ([Link Re ...
Virtual texture thumbnails appears brighter (incorrect sRGB/gamma) in content browser after asset is loaded
UE - Editor - Dec 9, 2025This is a regression, it worked correctly up to UE 5.5 but behaves incorrectly in UE 5.6 up to latest. When a regular texture with sRGB enabled is converted to a virtual texture, its thumbnail in t ...
Crash when saving after resetting Instanced array element via Property Matrix on placed actors
UE - Editor - Nov 21, 2025When an Actor Component contains an Instanced UObject array marked EditDefaultsOnly, adding a new element to the Blueprint defaults correctly updates the Blueprint and its own Property Matrix. Howev ...
Unshelving a file from Unreal locks unreal. Killing process leaves the file locked and can't be checked out
UE - Editor - Nov 17, 2025Unreal currently locks any assets that are loaded. Actions such as "revert" from within the editor handle this properly by unloading the asset but unshelving from within the editor does not respect ...
Typo in "BaseEditorSettings.ini": under section [/Script/UnrealEd.ContentBrowserSettings], key "DisplayPluginFolder" (singular) should read "DisplayPluginFolders" (plural).
UE - Editor - Oct 11, 2025File "<ENGINE_PATH>/Engine/Config/BaseEditorSettings.ini" contains the following setting: [/Script/UnrealEd.ContentBrowserSettings] ; Whether to display the game project plugins in the Content Brow ...
New folder shortcut (Ctrl+Shift+N) does not work in multi-Content Browser layouts until a folder is manually focused
UE - Editor - Sep 23, 2025In multi–Content Browser layouts, the New Folder shortcut (by default Ctrl+Shift+N) does not work immediately after switching to another Content Browser tab. It appears that the editor does not auto ...
Revision Control > View Changes: Request for direct navigation from the Content Browser assets right-click menus to View Changes
UE - Editor - Sep 22, 2025Right-clicking any object (Assets or ExternalActors) in ViewChanges allows selection. Conversely, using Source Control > View Changes from an Actor's right-click menu in the Outliner navigates to Vi ...
Revision Control > View Changes: Request to add functionality to copy paths and short package names directly from ViewChanges
UE - Editor - Sep 22, 2025Hovering over items in the ViewChanges list shows resource paths and short package names, but these cannot be copied. Users must instead select the Actor in the Outliner to copy this information. Pl ...