When using Perforce, saving a level over another leaves the target umap file as "marked for delete"

UE - Editor - Workflow Systems - Mar 11, 2025

When working on a level asset and using command "File – Save Current Level As..." to save it over a different level asset, the engine first deletes the target level (that's going to be overwritten) ...

Moving an InstancedStaticMesh will not move meshes collision

UE - Simulation - Physics - Apr 10, 2015

Moving an instanced static mesh will not move the collision along with the mesh. This will leave a visible mesh that players can walk through in one area and a blank space that cannot be walked thro ...

Expose to Matinee requires variable to be "editable" for it is usable in Sequencer/Matinee

UE - Anim - Sequencer - Jun 15, 2016

Expose to Matinee requires variable to be "editable" as well. If this is expected, can we have "Editable" be enabled when you enable "Expose to Matinee"? ...

Default values set in code are not overridden in character blueprint

UE - Gameplay - Blueprint - Mar 23, 2015

If a C++ class based on Character has a default value for a variable and the value is overridden in blueprints, the default value will be shown in game rather than the BP value. ...

LIVE: Variables of type UserDefinedStruct that are not compiled when a project is closed will not be visible when the project is reopened

UE - Gameplay - Blueprint - Nov 18, 2014

If a variable of type UserDefinedStruct is created in a Blueprint and the project is closed before the Blueprint is compiled, upon reopening the project that variable will not be visible in the My B ...

Altering interface outputs/inputs causes compile errors on blueprints calling interface

UE - Gameplay - Blueprint - Sep 4, 2015

If an interface is called in a blueprint and then altered, the blueprint will receive a compile error until the interface is removed and re-implemented. ...

UMG Textblock with no font drops FPS by ~30

UE - Editor - UI Systems - Feb 21, 2015

FPS drops in PIE when a widget is called that has text with no font selected. ...

Undo Delete Subcomponent/Child Actor of Blueprint while Playing Causes Crash

UE - Gameplay - Blueprint - Mar 12, 2015

The title pretty much explains it all. When creating a blueprint and using a subcomponent or child within that blueprint, deleting the child actor, and then undoing while in play, causes crash. ...

Pawn Sensing Component is not registering sound data within hearing radius

UE - AI - Oct 30, 2014

While using a pawn sensing component in an actor, the actor will not respond to sound data that is within the radius of its hearing threshhold/LOS hearing threshold. Additional notes: This was a ...

OnComponentEndOverlap and GetOverlappingActors are not in sync

UE - Gameplay - Dec 23, 2014

GetOverlappingActors will return a value when used immediately after OnComponentEndOverlap. Putting a delay after the OnComponentEndOverlap call will result in GetOverlappingActors to return null, s ...