Unreal Engine Issues

Debug is not functioning within the Blueprint Function Library

The blueprint debug filter is not working properly. It shows when your print string is being called but it isn't showing the trace location of the actual function from the blueprint. ...

LIVE: Changing a Custom Event to Multicast in a parent blueprint causes crash

Changing a Custom Event to Multicast in a parent blueprint causes crash if the Custom Event is being used in the child blueprint. Callstack: MachineId:DE189244480D3CD0F8CA729A02DD38A6 UserName:tjb ...

Smart Links are Removed During Dynamic NavMesh Regeneration

Smart links disappear whenever the Nav Mesh regenerates while using Dynamic Runtime Generation. For example, if you have a dynamic object that is constantly moving and causing the Nav Mesh to rebuil ...

Blocking volumes moved into sublevels from the persistent level do not correctly function in standalone game

If a blocking volume is created in the persistent level and then moved to a sublevel, it will no longer correctly block objects in standalone game. ...

Overridden Interface Functions in Child BPs lose array output pins after closing/reopening the project and become invalid

Overridden Interface Functions in Child BPs lose array output pins after closing/reopening the project and become invalid. Reproduced in Main //depot/UE4/Promotable-CL-2434822 ...

UMG Throbber is not showing in project when using 'Set Number of Pieces' node off of Event tick

If you add a throbber to a UMG Blueprint and use the Graph of the Blueprint to change the 'Set Number of Pieces' and use 'Event Tick' to tick the widget, the throbber widget will not appear on scree ...

Renaming Blackboard Key Not Updating Behavior Tree References

When renaming a blackboard key using the Entry Name box in the key's details panel, the names of the references in the behavior tree are not updated automatically. This is inconsistent behavior be ...

Replacing Selected Actors does not replace all references.

When using the "Replace Selected Actors with" feature in the editor, references to the replaced actor are not updated to reference the new actor (where valid). They will appear to be replaced until ...

HLOD lightmap lost after level reopening with "save LODActors to HLOD Packages" option in project settings is on.

Editor Crash when changing Default Properties of a TArray of UStucts containing an InlineEditConditionToggle property in Blueprint Parent Class

This bug causes an editor crash. This crash occurs when changing the default values of a UStructs properties that are used as EditConditions, when they are set to InlineEditConditionToggle within a ...