conflicts with Leaflet.Draw for Microsoft Browsers

[MojioMS]

Using the latest versions of ui-leaflet, Leaflet.Heat and Leaflet.Draw works fine for Google Chrome, Opera, Firefox, but Microsoft Edge and Internet Explorer 11 are not showing any maps anymore.
Some older release-versions of ui-leaflet and the Draw Plugin show again maps on Microsoft browsers, but the Heat Plugin is not anymore working in any browser.

Steps to reproduce:
Download the Leaflet.Heat example. Integrate Leaflet.Draw as a library (e.g. via bower). Test it with Google Chrome, Firefox, or Opera. Depending on your library of Leaflet, ui-leaflet and Leaflet.Draw versions, you gonna either see the working Heatmap but tested with Microsoft Edge you dont see any map OR you dont see any heat layer, but microsoft edge shows u a map (also without heat layer).