title: SKSpriteNode won't follow exact path
body: <p>Issue is described in the image.</p>
  
  <p>to 2: the SKSpriteNode should move again if the blocking node is removed</p>
  
  <p><a href="https://i.stack.imgur.com/blWXs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/blWXs.png" alt="enter image description here"></a></p>