I am single player, softcore and quite necro-fan.

In 1.10, I had a bone-mancer, but ancients became a fead end.
Why?
My main defence was revives, but when I entered Rocky Summit (Arreat Summit), all my revives dissapeared. They were all summoned just before I entered, and they were close to me. I tried many times, but the same thing always happened.

In 1.11, the same thing occurred, but only 4 of my 8 revives dissapeared.

Is this common?
Is it a bug?
Is it something blizzard did on purpose, and partially changed in 1.11?