Same thing happened to me last night, everyone left while i was looking at stats on the item, bam in my inventory while i was trying to hit pass on it.
I'm pretty pissed off about it, since it is now going to stop my gear progression on my alt for another week.

I've made another thread about this on this sub-forum, you should post in it just to raise awareness.

If you are going to gate people on loot SE, then at least release a non-broken half ass'd system.