(Quest issue): Stop the Bombardment bug (last Branch Legion)

When you want to finish the quest, the item to destroy 'Soul Engine Devastator' does not appear in the map, as it does with Doom Fortress Devastator and Forge of Corruption Devastator.

Video sample from WoW retail working fine: https://www.youtube.com/watch?v=qx8VXUiTRgo

**I'm test with ADB_735.10 and ADB_735.00 on last Branch Legion = 7.3.5.26972.**