Why does my dynamically attached component miss overlap events?

Collision events bind once. Subscribing OnComponentBeginOverlap before attach yields a handler with stale ownership. Bind after AttachToComponent and after RegisterComponent.

Update collision profile?

After attach, call SetCollisionProfileName to ensure the new attach target's coordinate space is honored. Some collision shapes need re-evaluation.

Weld merges body to parent's physics; collision events still report through parent's component. Separate attach keeps independent body.

Fix: Unreal Component Attached At Spawn Has No Collision

Quick answer: Bind OnComponentBeginOverlap after RegisterComponent and AttachToComponent. Pre-attach binds are stale.

Spawn weapon, attach to character socket. Damage zone overlap doesn't fire. Subscription happened pre-attach.

The Fix

BP:
  Spawn Actor (Weapon, Deferred)
  Set parameters
  Finish Spawning

  Get Damage Component:
    Attach Component To Component (Socket)
    Register Component
    Bind Event to OnComponentBeginOverlap (Handler)

Order: spawn → finish → attach → register → bind. Collision world tracks component via the now-correct hierarchy.

Verifying

Walk weapon through enemy: overlap fires. Without re-bind: silent.

“Attach. Register. Then bind.”

Related Issues

For SpawnActor Deferred, see spawn deferred. For Event Dispatcher in Construct, see dispatcher.

Order matters. Bind last.