title: iOS: WebKitLegacy crashes
body: <p>After some relatively safe (as for me) modifications the app began crashing on some WebKitLegacy stuff. I see many crashes in Fabric but can't find stable steps to reproduce.
  Does anyone know what can cause those crashes? Please see images attached.  </p>
  
  <p>Some app screens use UIWebView to display content - I assume that the problem is somewhere there.</p>
  
  <p><a href="https://i.stack.imgur.com/zBHzZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zBHzZ.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/Ob35k.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Ob35k.png" alt="enter image description here"></a></p>