I get this problem as well wanted to know if it was a bug also, dint wanna make a new thread

Platform: Windows 7x64
ISP:Karro
Type of Internet Connection:ADSL2
Internet Connection Speed:24M/s
Date & Time: after patch 1.19
Frequency: Everytime using multishot/nooked arrows
Character Name:Kaida Kanzaki
Race:Miqo'te
World:Mysidia
Class/Skill Rank:Archer 42
Physical Level: N/A
Area and Coordinates: All
Party or Solo: Both
NPC Name:N/A
Monster Name:all
In-Game Time: All
Steps:
1. Use multishot nook 3 arrows
2. Fire, land more than one hit
3. Get TP for one arrow

If this is intended it blows chunks *sadface*