ISP:
Doesn't matter.

Type of Internet Connection:
Optic Fiber.

Internet Connection Speed:
30MB.

Date & Time:
various

Frequency:
Sometimes

Character Name:
It happening to many, I guess.

Race:
Doesn't matter.

World:
Balmung

Class/Level:
White Mage 50.

Area and Coordinates:
everywhere.

Party or Solo:
Party.

NPC Name:
None.

Monster Name:
None.

In-Game Time:
various.

Steps:
Casting Regen on players with Regen about to fall off sometimes is ineffective in overwriting and renewing the Regen.