I emailed with Jason Burns of Blast Cult regarding the Low Life's and this is our conversation:
Me: "My name is Loran and I've been playing a set of Low Life steel strings since June of 2013. I've been very happy with them, playing Carl Perkins and Johnny Cash covers slapping about half the time, gigging once a week consistently. Last week I noticed the G string felt weird and I saw that the winding was coming off. I've attached a picture, you can see that it's away from the nut around the A - C area. I plan on ordering another set but am concerned about this happening again, what are the possible causes or is this the end of their expected lifespan?"
His response: "Low Lifes are designed for slapping and low tension. That makes the strings slightly more delicate because they are wound lighter using lighter materials. The lifespan will be different from player to player depending on frequency of play, how hard you slap, weather, etc. I think if you gig regular, 6 months would be a long life for those strings. They WILL wear out but also any little ding or crease will eventually start the string from unwinding prematurely. This can happen even when your bass is in a padded bag and you may not notice hitting the front of the fingerboard or something laying or touching your case while transporting in a car. It doesn't take much to get it started but once it starts the string needs to be changed so it doesn't blow up on stage."
I transport in a padded bag so it's very possible I dinged the string, but it also sounds like they may have been coming to the end of their lifespan. After trying other strings I reordered the Low Life's, best bass tone and slap sound I've found and they feel great to play. I'm going to take better care and should get a year out of the new set.