Platform:
Multiple platforms. Windows 7, Windows XP

ISP:
Multiple ISP

Type of Internet Connection:
DSL

Internet Connection Speed:
Various speeds.

Date & Time:
Multiple occurences between 12:00a(cst) and 3:00a(cst)

Frequency:
often, seems to occur when multiple enemies are killed at once.

Character Name:
Kojuan, Jippet, Beerga, Kbizzle, Sullia

Race:
Multiple races including Hume M F, Taru, Mithra, and Elvaan

World:
Phoenix

Main Job:
Corsair 60, Ninja 90, Whm 90, Rdm 90

Support Job:
dancer, ninja, rdm

Area and Coordinates:
Abyssea- Grauberg (K-5)

Party or Solo:
Alliance 18

NPC Name:
None

Monster Name:
Monitor

Steps:

Alliance members were standing against wall at (K-5) while a Warrior was engaged with multiple "Monitor" using the weapon skill "Fell Cleave", assisted by a RDM.
Damage given to Monitor would not cause issue unless multiple of the enemies died at the same time.
Unsure of the reason why members disconnected, party continued as normal.
Damage dealt with Fell cleave would not cause issue unless the targeted group of monsters were dealt a killing blow.