Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh

Repro: type "a" and then after a second "b"

Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.

Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
componentDidMount() {
          Scheduler.unstable_yieldValue(`Mount [${this.props.text}]`);
        }
        componentDidUpdate() {
          Scheduler.unstable_yieldValue(`Update [${this.props.text}]`);
        }
        render() {
          return <AsyncText {...this.props} />;
        }
      }
      function App() {
        return (
          <Suspense fallback={<TextWithLifecycle text="Loading..." />}>
            <TextWithLifecycle text="A" />
            <AsyncTextWithLifecycle ms={100} text="B" />
            <TextWithLifecycle text="C" />
          </Suspense>
        );
      }
      ReactNoop.renderLegacySyncRoot(<App />, () =>
        Scheduler.unstable_yieldValue('Commit root'),
      );
      expect(Scheduler).toHaveYielded([
        'A',
        'Suspend! [B]',