T9 and the Golem refusing to die

Date & Time:
23:35 CET

Frequency:
Once (Did not reproduce)


Character Name:
Aelia Sokoto, Cerberus

Retainer Name:
None

NPC Name:
None

Monster Name:
Dalamud Spawn

Class/Level:
Paladin 60

Party or Solo:
Full Party 8

Race:
Miqo'te F

In-Game Time:
Please list the in-game time that the issue occurred.

Area and Coordinates:
The Holocharts

Housing:
None

Steps:
- Joined T9 carry for a friend
- Friend hugs wall for easier undersized carry
- Normal pull with 1 meteor before Golems
- Golems spawn and we kill two of them fast
- Third Golem stays at 1% health whatever we do
- Tried to adjust but on second round 2 Golems merged (as there were now 4 of them) and we got a Supergolem :(

Video recording of occurance here:
https://www.youtube.com/watch?v=3TpHgvVpnug