WOTLK
Queue for RDF and get the Azjol-Nerub dungeon. Kill the first boss. Go to the room where Hadronox spawns. Kill the 3 gate keeper NPC’s that spawn at the webbed hill. Wait for Hadronox to walk up the spiral up to the webbed hill. Watch Hadronox die not heal and quickly to the spawned mobs before players have a chance to engage.
Character name: Majo
Realm: Faerlina
It seems that Hadonox is not healing anymore. If I recall correctly, Hadronox is supposed to constantly heal while killing the spawned enemy mobs at least until the party engages Hadonox. Back in the original WOTLK, Hadronox was supposed to stop healing after the party killed enough of the enemy mobs that are attacking Hadronox. This was also supposed to trigger the phase where the enemy mobs stop spawning and coming out of the temple building.
Because Hadronox died to enemy mobs, we did not receive 1.) credit for the kill, 2.) the loot, and 3.) the achievement for completing Azjol-Nerub. See the two screenshots linked below showing 1.) Hadronox DEAD and 2.) not receiving the completed achievement for the dungeon because the enemy mobs killed Hadronox (not the party):
h t t p s://ibb.co/Ks7H3Lw
h t t p s://ibb.co/rQnBtpG