problems with quest in Blade Edge Mountains 3

The third not properly worked quest is this one http://wowroad.info/?quest=11079 To summon demon who drops needed quest item http://wowroad.info/?item=32733 must gather 35 apexis crystals. It;s easy but when i go to Apex prism and summon demon who drops the whip he cannot be lured into combat. Some sort of struck but he is on front of my eyes. Neither other minions around him cannot lured him with them when attacking me. To work properly after summoning he have to attack the summoning party (players who summoned him). The problem occured yesterday 16.07.2017 at 19:00 The quest giver is http://wowroad.info/?npc=23300 and the quest is also needed for both achievment and reputation with Ogri'la. Problem was on wotlk logon3 server