Unreal Engine Issues
Unreal Engine Issues
WP: Using Make Writable when deleting actors from scene does not delete the actors
UE - Engine Scaling - Streaming - World Partition - Aug 4, 2026When working in a World Partition level using OFPA, trying to use the "Make writable" option instead of checking the asset out will result with the actor coming back to the map after restarting the ...
StreamingGeneration: Actor desc mutator phase now writes ActorDescView directly, breaking the cluster-invariant check in ValidateContainerInstanceDescriptors
UE - Engine Scaling - Streaming - World Partition - May 22, 2026This report is from an EPS case: We hit a regression upgrading our project from 5.7 to 5.8. Map Check (and any other path that ends up calling UWorldPartition::CheckForErrors) assert inside FWorld ...
ServerUpdateLevelVisibility called multiple times from UWorld::AddToWorld/RemoveFromWorld due to child connections
UE - Engine Scaling - Streaming - World Partition - Apr 16, 2026A recent change to ULevelStreaming::ServerUpdateLevelVisibility ensures that this only calls APlayerController::ServerUpdateLevelVisibility once for any non-child connections ( ...
Orphaned BP actors when using UWorldPartitionBuilder
UE - Engine Scaling - Streaming - World Partition - Nov 21, 2025From an EPS case: --------------------------------- We're seeing a recurring issue where child BP actors are becoming orphaned during any processing that uses UWorldPartitionBuilder. It affects ...
Extend Worldpartition Editor Grid Widget
UE - Engine Scaling - Streaming - World Partition - Oct 14, 2025Licensees are looking into ways of adding visualizations to the editor worldpartition grid widget. In one example case, just adding some lines to show which parts of the wp minimap belong to which s ...
UWorldPartitionSubsystem::IsStreamingCompleted returning the wrong query result when all cells and actors in location are in DataLayers
UE - Engine Scaling - Streaming - World Partition - Jul 24, 2025Context: Data Layers is a system within World Partition used to organize Actors both in the Editor and at runtime. It allows for the user to dynamically load and unload layers in the Editor to help ...
Actor corruption due to Hierarchy broken after load
UE - Engine Scaling - Streaming - World Partition - Apr 25, 2023We recently hit a situation where some actors would suddenly teleport across the map when they were modified in the editor. We figured out that the AttachParent of some actors got reset on editor l ...