So.. Screen shots are not definitive proof (as one can always run in LFR and make it look this way... (wowprogress reporting we just killed him would say more anyways)
But our guild just killed Garalon on 10 man... just to see him offer loot.. then despawn & respawn before loot could be clicked on....
This a known bug for Garalon? very frustrating after spending 2 hours on him :-(