title: iOS Memory Leak using coreplot
body: <p>I am getting a memory warning after setting up a bar chart, hitting the home button and returning to the chart (it recreates after starting back up).  I am trying to find the memory leak in Instruments but I'm not sure what I'm looking for, below is a screenshot from Instruments.</p>
  
  <p><img src="https://i.stack.imgur.com/2FrPq.png" alt="enter image description here"></p>
  
  <p>Can anyone help me out?</p>