Same for me. Now that I have access to the challenge i can no longer build the snowman on any map. I could build it before patch but didn't have the challenge unlocked yet. And now the event is only a few hours from ending and i can't build more than a quarter of it. This is extremely aggravating and is only one of many bugs which have lead me to consider leaving this franchise behind.
This is why games need to be fully tested and bugfixed before release rather than relying so much on patches after the fact. It shines a bright light on EA's lack of integrity and greed. Making paying clients bug test an obviously unfinished product is not how any great software company operates so why do gaming companys think this model will sustain their business any better?
