Unreal Engine Issues

In editor, custom primitive data dont work on instance static meshes in bp instance

Changes to custom primitive data properties for instanced meshes placed in the editor work in-game but are not otherwise reflected in-editor. ...

Crash when starting PIE on a World Partition level with a Niagara Component inside nested Child Actor Components

Consider an actor containing a Niagara Particle System Component, which is instantiated from another actor's Child Actor Component. When initializing PIE on a World Partition level containing this s ...

Dynamic (transient) material instance assignment lost if object spawnable

Material Instance Dynamic assigned to Spawnable objects with Editor Utility Widget get reverted when hit the Save button in Sequencer. This appears to come from the Material Instance Dynamic not be ...

Installed Editor doesn't package the right target if Marketplace plugin are installed before first launch

Something is wrong with the TargetInfo.json file generated when they are some Marketplace plugin installed. The client reported this workaround:  Backup the plugins found in Engine\Plugins\Marketp ...

Renaming Niagara's emitter name in the Timeline panel causes a crash

Renaming an emitter's name in Timeline panel of Niagara editor causes an editor crash. This happens because FViewModelHierarchyOperation constructor is called with null InAnyModel ptr; FViewModelHi ...

Crash on Unreal Editor Exit due to subclass of UEditorUtilitySubsystem

Since UE5.4, it has been reported that if there's a class derived from UEditorUtilitySubsystem, the program crashes when the editor exits. This is because the code added in CL30853505 accesses freed ...

Editor will crash if a material uses ImposterCaptureSwitch material function after build lighting

EnhancedEditorInput.bAutomaticallyStartConsumingInput editor setting resets to false on editor startup.

The editor setting for automatically start consuming input can be set to enabled as a boolean, but whenever the editor restarts this value is reset to false. ...

TAttributeContainer::CopyFrom crashes when container contains invalid bone indices for active mesh

Currently there's no validation within the animation attribute container that bone ids are valid.  This means that client/game code can add attributes with invalid bone ids into the container and th ...

Special characters in file names are not escaped on Perforce commands

Files and directories with special characters %, @, * and # are not escaped when sent to the P4 Client API. For example, an '@' character is common in root workspace folders when using concurrent bu ...