title: System font renders as Times New Roman on iOS 13
body: <p>I have some <code>UILabel</code> with the default system font. But when I install my app on iPad or iPhone with iOS 13.1 the fonts change to something like <code>Times New Roman</code>! Why does this happen? I am sure the label's text is Plain and the font is <code>System</code>. How can I fix this issue?</p>
  
  <p>PS: I have downloaded all SF fonts from Apple web site, and still no luck!</p>