I've merged all the shrine topics together to make this easier. Some mystery admin (not me) has already gone around and either moved the shrines or opened up areas where the birds would be stuck. I tested each several times, and they seem to be working fine. Articuno can still spawn in the wall, but always popped out next to me after a second or two. If you are still concerned that the bird might die when you summon it, I would advise either recording evidence so we can get you a replacement orb, or asking an admin to watch you summon it.