While playing one of the missions we got an activation event that said heroes suffer 3 random conditions. There's really no precedent for how to handle the situation, so we took one of each card, shuffled them up and gave the top three to one hero. We then replaced those three and did the same for each other affected hero. So far so good. The next turn we get the same message, and we had a debate about whether it meant that they suffer three new conditions of if it meant that they are hit with three random conditions and they may luck out and get one or more again, thus ignoring them.
In other words should you take all 7 (in my case) conditions and pull the top three to give to each hero, or do you randomly select from the ones they don't already have? I guess the thing to consider is what they mean by "suffer" the condition.
Related to that, one of the heroes in question was Ispher. Since he's immune to poison, can that be one of the random conditions?
In the end we went with the usual rule for FFG co-ops to do whatever hurts the players the most, but no one was completely convinced either way. I'm curious how others have handles this situation.