I always use 1318 and never drop the temp back down. I haven't had a problem. Your under two weeks comment worries me. I'm going on vacation Friday and I have a batch which normally would be ready for kegging on Saturday. I was going to do second dryhop in the dryhop keg tomorrow (day 9) and transfer to serving keg/force carb Thursday night.
I'm wondering if I should cold crash it for a week and then force carb it when I get back.
How long do you usually go prior to kegging?
My though about your current situation is - nothing to loose by an extended cold crash. Or even an extended ferment. But others seem to be able to get into the keg in under 2 weeks. I just run into that harsh taste that way. I would love to determine the exact cause.