Reaper Ambush in What Dreams May Come


Well-known member
I've run heroic reaper What Dreams May Come several times and more than half the time, when we are done with the dream world and return to the real world we are ambushed by a bunch of Reapers who sometimes (due to teleport lag) kill the whole party before we have a chance to react. This has happened to me twice.
I am wondering do they spawn there and wait for us to return then ambush us?
Do they teleport back with us after we "finish" the dream world, but don't kill them because we don't see them?
Do they teleport back from the optional area that we skipped?
Something else?
Has anyone else seen them?