Xavinien NPC causing game/console freezing

Platform: Xbox360/PC
ISP: Metronet
Type of Internet Connection: Optic Fiber
Internet Connection Speed: 50 Mbps
Date & Time: September 25th, 2013 04:45am EST
Frequency: Always
Character Name: Xarxsis
Race: Male Hume
World: Lakshmi
Main Job: Bard
Support Job: White Mage
Area and Coordinates: Eastern Adoulin F-9 (Scouts Coalition)
Party or Solo: Party and Solo both
NPC Name: Xavinien
Monster Name: None
Steps:
1. Speak to Xavinien and select to view skirmish or delve treasures.
2. Attempt to switch from skirmish treasure to delve treasure or vice versa without exiting and restarting the chat with the NPC causes game to freeze and crash to desktop on PC or will hard freeze the Xbox360 and require physically powering off the console to fix.
3. Replicated this event multiple times in a party with people on the PC platform (Bawx, Zetoo, and Valynne), we all would freeze when attempting to switch rewards after viewing skirmish or delve and then attempting to select the opposite option without exiting and restarting the NPC chat from the beginning.