I noticed the same thing a year or so ago, at 2-3 am was watching something FTA and it up and quit. Did a quick check though and the whole bird wasn't out just the transponder I was on. Came back about an hour later. I just assumed it was maintenance of some sort and they figured the least viewers that late at night.
Usually this sat is super strong signal for me on ME. Almost %100. I have noticed signal drop in the early AM down to %60 briefly and then it gradually strenghthens to full power as the morning goes on. I was thinking a bit of solar interference, but maybe not.