If I put this html code in the editor and then save it:
<p><i class="fa fa-check" style="color: green;"> </i></p>
When I look at the HTML again it looks like this:
It strips out the Italics tag. Normally this wouldn't be a problem but we using Font Awesome and this messes that up. I noticed that it only does this if it's in a table, if I put that same italics tag outside the table it works fine. I was able to verify this same behavior using the online demo page.
I am using Kendo UI v2018.1.221