Xbox 360 crashing using equipsets before inventory is loaded

Platform:
Xbox 360

ISP:
Virgin Media

Type of Internet Connection:
Optic Fiber

Internet Connection Speed:
20Mbit/s

Date & Time:
10th September, 20:55 GMT+1

Frequency:
Always

Character Name:
Sixo

Race:
Race of your character when the issue occurred.
ElvaanF

World:
Bismark

Main Job:
WHM99

Support Job:
SCH49

Area and Coordinates:
Area and map coordinates where the issue occurred.
Any area

Party or Solo:
Solo

NPC Name:
None

Monster Name:
None

Steps:
1. Change area or log in.
2. Before the inventory is loaded up, with the "bazar" loading icon still displayed in the top right corner use a macro with /equipset to change gear.
The Xbox 360 then totally stops responding.