https://codesandbox.io/s/upbeat-frost-3tt25

1. Press Suspend, see "Loading..."
2. Wait five seconds, you'll see "Happy birthday" at some point 
3. You won't see it again no matter how long you wait

Expected: you'll see it every five seconds.
props,
          renderExpirationTime,
        );
        return child;
      }
      break;
    }
  }
  let hint = '';
  if (__DEV__) {
    if (
      Component !== null &&
      typeof Component === 'object' &&
      Component.$$typeof === REACT_LAZY_TYPE
    ) {
      hint = ' Did you wrap a component in React.lazy() more than once?';
    }
  }
  
  
  
  invariant(
    false,
    'Element type is invalid. Received a promise that resolves to: %s. ' +
      'Lazy element type must resolve to a class or function.%s',
    Component,
    hint,
  );
}
function mountIncompleteClassComponent(