Content font famility is changed when a word is spell checked in Chrome in Windows 7. Video: https://www.screencast.com/t/Y358IWoWz Steps to reproduce: Paste the following content in this demo: http://demos.telerik.com/aspnet-ajax/editor/examples/overview/defaultcs.aspx <span id="ctl10_supportMessagesRepeaterControl_repeaterMessages_ctl11_lblMessageText" class="text"><span style="font-family: Arial; font-size: small; background-color: #ffffff;">Dear Telerik </span><br style="font-family: Arial; font-size: small; background-color: #ffffff;" /> <br style="font-family: Arial; font-size: small; background-color: #ffffff;" /> <strong>Notice: Issue: 2016: WestenBook Help and Test<br /> Please check it 20170828 </strong><span style="font-family: Arial; font-size: small; background-color: #ffffff;"></span></span>