Refresh hint visibility after $set()

I have a hint that is conditionally visible. After setting a value in the hint action, the hint should be hidden again, but it only works after pressing the button twice. The reason is, that after calling $set(), the hintAction is apparently called before the value is updated, such that $get() will return the previous value. How can I get the correct (newly set) value inside the callback such that it returns null correctly?