title: leaflet.js IE11: Tile imgs are not visible but they are still in the DOM
body: <p>I am working with leaflet to render construction plans for our software. The plans are jpg tiles.</p>
  
  <p>It worked since about 9 months in the browsers IE11, firefox, chrome, safari. But since yesterday I cannot see the tiles in IE11 but it loads the tiles and the tiles are also in the DOM. I thought it is maybe a CSS issue, but I am not able to fix it.</p>
  
  <p>Does someone know which issues this could be?</p>
  
  <ul>
  <li>leaflet version: 1.2.0</li>
  <li>leaflet.markercluster: 1.2.0</li>
  </ul>
  
  <p>It is a react application with react 16</p>
  
  <p><img src="https://i.stack.imgur.com/FIfun.png" alt="Map view in IE11"></p>
  
  <p><img src="https://i.stack.imgur.com/Hk6zo.png" alt="Map view in chrome"></p>