Unreal Engine Issues
Unreal Engine Issues
Fix delegate problems with Blueprints
UE - Foundation - Core - Feb 18, 2015https://udn.unrealengine.com/questions/236428/bug-blueprints-executing-zombie-code.html Blueprint MyCharacter is based on native class CodeFirstPersonCharacter. CodeFirstPersonCharacter has compone ...
Changing root component in C++ does not apply correctly to map placed actor instances
UE - Gameplay - Jan 4, 2023Edit: Please investigate for not only root component changes, but native component hierarchy changes in general and whether those hierarchy changes apply to actor instances saved as part of maps. O ...
"r.SetRes 1920x1080f" fails to set fullscreen mode when executed through blueprint node
UE - Graphics Features - Jan 19, 2016Executing the r.SetRes _x_f command fails to set fullscreen mode when executed through blueprint node. The issue occurs when executing the command through level blueprint and an actor blueprint plac ...
Blueprint CDO contains removed component from parent class
UE - Gameplay - Blueprint - Apr 28, 2015Blueprint CDO contains removed component from parent class. From the AnswerHub post: "It appears that if a component is removed from the C++ class, the CDOs for all of the blueprints remain unchang ...
Old property values can be applied when updating an unmapped reference in custom NetSerialize struct
UE - Networking - Apr 13, 2023This seems to be caused by the following:The struct, which has an actor reference property as well as some other properties, implements its own NetSerialize function.When the actor reference propert ...
Blueprint classes are listed in Object pickers, but will not work as expected
UE - Gameplay - Blueprint - Jul 28, 2020Because of the way blueprints are implemented, the "Blueprint Class" asset actually points to the editor-only UBlueprint object. Because of this, all blueprint classes will show up as options for ge ...
Edits to floating point properties do not propagate to blueprint object instances if old values have more than 6 decimals of precision
UE - Editor - Workflow Systems - Apr 28, 2023[Link Removed] JH 2023-04-28 01:12:36 UTC Editing any object's float/double property via an Editor details panel will be truncated if it has more than 6 decimals of precision. (e.g. if I type in 0.12 ...
Setting a struct bool property (bitfield) to itself writes the wrong value
UE - Framework - Blueprint Compiler - Sep 17, 2025There's an issue when assigning a bitfield bool to a native bool in Blueprints. Currently, the engine erroneously treats the memory for a local bool as a uint8 bitfield, which is undefined behavior. ...
User-instanced subobjects owned by a streaming sublevel's Blueprint CDO cannot be garbage collected with the owning world after the sublevel has been reloaded in the editor.
UE - Gameplay - Blueprint - Feb 5, 2020Strong object reference properties of an 'EditInline'-decorated UCLASS type embedded within a native C++ struct definition can be instanced at edit time by the user as part of a variable's default v ...
Runtime-generated components stored in the VisibleAnywhere array are not displayed in the detail panel
UE - Gameplay - Components - Jun 30, 2022Runtime-generated components stored in ObjectPtr with VisibleAnywhere are displayed in the details panel, but not for arrays. Applying the following workaround, components can be visible even in ar ...