xstate@5.32.3

Patch Changes

• #5575 830db8b Thanks @JSap0914! - Fixed initialTransition (and transition) throwing "Actor with system ID '...' already exists" when the machine contains an invoke with a systemId.

  Root cause: createInertActorScope used createActor(logic) internally, which eagerly ran getInitialSnapshot during construction and registered any systemId-carrying child actors in the system. When the caller then ran getInitialSnapshot (or transition) via the returned scope, the same system was reused, causing the duplicate-registration error.

  Fix: After creating the internal actor, createInertActorScope now replaces the actor's system reference with a freshly-created system. Child actors spawned by the subsequent caller-driven getInitialSnapshot / transition invocation therefore register into a clean system with no pre-existing entries.

  const machine = createMachine({
    initial: 'idle',
    states: {
      idle: {
        invoke: {
          src: fromPromise(async () => 42),
          systemId: 'myActor' // previously caused: "Actor with system ID 'myActor' already exists"
        }
      }
    }
  });
  
  // Now works correctly — returns [snapshot, actions] without throwing
  const [snapshot, actions] = initialTransition(machine);

• #5585 a551a2b Thanks @RubenFricke! - Add missing https:// protocol to the Stately Studio link in the README