Anomaly in waterfall View

For this website and only on IE, there’s something unusual in waterfall view and also in total run results.
After DNS it haulted for almost 700-800 ms and before sending a connect request to the server. I haven’t found same behaviour for this website from different browser.
http://www.webpagetest.org/result/151227_V4_1250715747cb51c90534bc0f9e4bdf18/1/details/
Also it happens almost everytime i test it on IE11.
Thanks.