I'm not 100% on this, but obstacles I've seen on my team have all vanished within 1-2 minutes of them showing up, which makes it problematic when I have to play a game of matlal's jewels or battle the gooli army. Unless it's my team being wonderful, I really doubt that I've managed to catch the last minutes of the last four obstacles straight. I know I can catch the daily events up later but I do want to help :(