"Delve bosses in Cyrodiil now spawn like other Delves in Tamriel. Happy hunting!" patch notes from the Wolfhunter update.
I checked with several Delves during various times of the day, on different campaigns as well. Whenever I enter a delve, All the bosses seems to have disappeared. Even on delves like Toadstool Hollow, where 5 bosses are present, whenever I enter, all of them are not there except for all the trash mobs untouched. I checked with Shor when it's dead and no other player could have entered the delve recently.
It seems that you have to wait about 10-15 minutes for the bosses to spawn whenever you enter a delve. This is worse than what we had before the update and getting a buff means you are wasting atleast 15 minutes inside a delve. I'm wondering if anyone else encountered the same issue?
PC/EU (checked on shor/vivec)
PC/EU
4 years later, still waiting for most basic of bugs to be fixed in this game.
10/10 would recommend to a friend who wants to play with 300 ping