The spirit bloom chest acts like a timer. Once it's opened the Teleport chest you would get from Templar is on a timer and disappears after a certain amount of time. I believe it's 5 minutes. My team and I have confirmed this as we tested the theory and stood at the chest in the room and it disappeared. However, since it's 5 minutes we usually open the bloom chest anyway. It's pretty much safe if you know how to get to the other chest in time. As for more chance of exotic, not true at all. Just speculation with no data to back it up. I did a minor trial with my characters and it does not seem to affect the drop rate for exotic. Granted it's a small population in number but Bungies limit to once a week, I've been only able to open it on both characters 8 times. One character open the blooms, one doesn't. In 8 times, both my characters have gotten 2 exotics from it. Although the number is small, it shows no significant(possibly, need more testing). Happy Raiding!