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.
useLayoutEffect(() => {
          
          
          committedText = props.count + '';
          Scheduler.unstable_yieldValue(
            `Mount layout [current: ${committedText}]`,
          );
          return () => {
            Scheduler.unstable_yieldValue(
              `Unmount layout [current: ${committedText}]`,
            );
          };
        });
        useEffect(() => {
          Scheduler.unstable_yieldValue(
            `Mount normal [current: ${committedText}]`,
          );
          return () => {
            Scheduler.unstable_yieldValue(
              `Unmount normal [current: ${committedText}]`,
            );
          };
        });
        return null;