I've found lots of broken events over the last couple of days.Then to top it all I did pre event for the Shatterer, waited for ages, fought the thing. Got nowt.
What level are you? I found that when i did the Shatterer at lvl 48 i didn't get rewarded, i think because i couldn't do enough dmg to the boss, also had trouble targeting it when i did it. Tried it 3 times and still no reward, but when i hit lvl 50 and tried it again i got rewarded, so not really sure what's up with that.