Actor Component properties can become "linked" across multiple Blueprints after a hot reload

Gameplay - Components - Dec 3, 2018

If code in an Actor Component class is changed (eg. a new UPROPERTY is added) and a hot reload is performed to implement the changes, the properties in the component can become linked across any Blu ...

Set functions in UWindDirectionalSourceComponent are not exposed to be called from code

Gameplay - Components - Oct 4, 2018

None of the Set functions in the UWindDirectionalSourceComponent are able to be called from code. The functions can be called from Blueprint, but without the ENGINE_API macro, none of the functions ...

Overlap End/Beings when setting actor location

Gameplay - Components - Jun 22, 2018

In the provided example. The player's position is set on tick. This causes the overlap for the collision sphere being used to determine if the hands of the player are overlapping a surface to repeat ...

Renaming parent invalidates childs hierarchy

Gameplay - Components - Jun 22, 2018

When renaming the Parent of a Child Blueprint it invalidates the hierarchy of the Child Blueprint and nests its components under the DefaultSceneRoot. This bug was reported in 4.19.2 (CL-4033788) a ...

DestroyComponent(bPromoteChildren=true) does not try to use the socket name of a child when attaching it to the grandparent

Gameplay - Components - Jun 20, 2018

User reports that when we delete a component in the hierarchy and promote a child component in its place, we don't account for the socket name that the deleted component had used previously. ...

GameplayTag Query on Component Instance resets when reloading level

Gameplay - Components - Jun 14, 2018

GameplayTagQuery variables - when inside of a component, are not saved. User notes: "Note that this does not occur if the ActorComponent is added in code in a native actor and that the actor at S ...

Crashes Caused by Deinitialization of Variables with Specific Names

Gameplay - Components - Jun 14, 2018

I was able to repro the crash in 4.19. Unable to open sample project in 4.20 or 4.21. Per Licensee: While porting one of our classes from using UMaterialBillboardComponent to a hand rolled Billboar ...

Billboard Actor Component properties reset when attached to a Child Actor

Gameplay - Components - May 5, 2018

The properties of the Billboard Actor Component reset whenever they are changed while the Actor that the component is attached to is also a child of another Actor as well. ...

Crash force deleting blueprint being used as a Child Actor Component in an actor in the level

Gameplay - Components - Mar 23, 2018

REGRESSION: Yes, the crash does not occur in 4.18. A crash occurs when the user force deletes an actor blueprint that is being used as a child actor component in another blueprint that's in the lev ...

Performance problems (freeze) in SCS tree view with a significantly large number of components

Gameplay - Components - Mar 9, 2018

User reports an unreasonably long editor freeze when a significantly large number of components need to be processed in the SCS editor tree view (tens of thousands) when selecting an instance of a B ...