title: how to make the first label looks the same height as other labels in vertical stackview? why the first label become "shorter" than other labels
body: <p><a href="https://i.stack.imgur.com/j1pQE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/j1pQE.png" alt="this is my view hierarchy" /></a>
  <a href="https://i.stack.imgur.com/e78C3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/e78C3.png" alt="constraint of the stack view" /></a></p>
  <p><a href="https://i.stack.imgur.com/Q7Jma.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Q7Jma.png" alt="constraint of the stack view" /></a>
  <a href="https://i.stack.imgur.com/v6KjR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v6KjR.png" alt="constraint of the stack view" /></a></p>
  <p>How to make the first label looks the same height as other labels in vertical stackview?<br />
  Why the first label become &quot;shorter&quot; than other labels?</p>