Does sendParent work inside invoked actors?

[cmh-echomark]

I'm upgrading from xstate 4, and I'm having trouble calling events within invoked actors.

I assumed that sendParent was the best way to do this, but that does not appear to work as I'm expecting. However, I notice that self._parent.send does work... Not sure what the difference is.

Here is an example in codesandbox

Simplified machine below:

export const testMachine = createMachine({
  context: {
    guid: undefined,
    customStringKey: undefined,
  },
  initial: "idle",
  states: {
    idle: {
      invoke: {
        src: fromPromise(async ({ self }) => {
          /** This does not work, but self._parent.send(...) does? */
          sendParent({
            type: "TEST",
            guid: "d911aee7-988b-4941-8941-fa6d46f00df0", //<<< guid is NOT set
          });
          await sleep(3000);
          return "customStringValue";
        }),
        onDone: {
          actions: assign({
            customStringKey: ({ event }) => event.output,
          }),
          target: "done",
        },
      },
      on: {
        TEST: {
          actions: assign({
            guid: ({ event }) => {
              assertEvent(event, "TEST");
              return event.guid;
            },
          }),
        },
      },
    },
    done: {
      on: {
        RESET: { target: "idle" },
      },
    },
  },
});```