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.
const [a, setA] = useState(false);
      const [b, setB] = useState(false);
      if (a !== b) {
        setB(a);
      }
      
      
      
      const [c, setC] = useState(false);
      updateA = setA;
      updateC = setC;
      return `${a ? 'A' : 'a'}${b ? 'B' : 'b'}${c ? 'C' : 'c'}`;
    }
    act(() => ReactNoop.render(<App />));
    expect(ReactNoop).toMatchRenderedOutput('abc');
    act(() => {
      updateA(true);
      
      updateC(true);
    });
    expect(ReactNoop).toMatchRenderedOutput('ABC');
  });
});