I had pretty much the same issue with this strain. I had done a lager right before my current porter, so the temperature controlled freezer was at around 50F. I put my porter in and forgot to set the temp higher. It still had a kreusen by the next day when I noticed the low temp. I raised the temp up to 65F but the kreusen dropped the next day and I figured I had a stuck fermentation. I raised the temp up to 70F and then 73F but there was no new activity. I added a packet of nottingham that I have on hand for emergencies, and still nothing. Finally I decided to just take a hydro reading and it was completely fermented out at 1.015. I'm thinking it did all of the work in the first day and a half while it was way below temp. I think I like this strain.