joerginger wrote: »In my experience the delve (not dungeon) bosses in Cyrodiil have always taken ages to spawn and are never spawned automatically when you don't have the achievement for completing that delve yet and then enter the boss location. I guess this was done to provide more time for players to kill each other while waiting for the bosses to spawn.
Outside of Cyrodiil this is simply a result of account wide achievements. In ancient times, a delve boss would spawn the moment a character without the delve completion approached the boss location. Now it has to be a player without the delve achievement. So unfortunately the behaviour you observed is what we have to expect, both in Cyrodiil and outside of it.