Main hand weapon disappear

[Rzzil]

Type of Internet Connection:
DSL

Internet Connection Speed:
--

Date & Time:
Around 13:30 11/11/2015(GMT+10)

Frequency:
Once (Did not reproduce)

Character Name:
Rzzil Elakha

Race:
Lalafell F

World:
Gilgamesh

Class/Level:
LV.53 Culinarian (before)
LV.0 Adventurer (When issue occured)

Area and Coordinates:
Teleport from Foundation to Mor Dhona (Not sure about which map)

Party or Solo:
Party (2 members)

NPC Name:
Collectable Appraiser (Mor Dhona)

Monster Name:
None

In-Game Time:
--

Steps:
Trying to view Rowena's House of Splendors when issue occured.
Realize I was not on the right class.
Open my character menu try to switch to Culinarian and notice I equiped all my Culinarian gears except my main weapon (which cannot be unequip) and my class became "LV.0 Adventurer".
Search all over my inventory and armoury chest still cound not find it.