Disjoined Galka Shin-Zantetsuken bug

Platform: PC
ISP: att
Type of Internet Connection: fiber optics
Internet Connection Speed: 300mbit
Date & Time: december 4th 11:38 est
Frequency: once
Character Name:Kozumi
Race: mithra
World: leviathan
Main Job: dnc
Support Job: NIN
Area and Coordinates: dynamis bastok(d)
Party or Solo: party
NPC Name: Disjoined Galka
Monster Name: Disjoined Galka
Steps:
We were fighting Disjoined galka, he summoned disjoined odin which then used Shin-Zantetsuken TWO times in a row at the exact same time. We all had RR, first one used up our RR, 2nd one didn't.

I am led to believe that you should not be getting Shin-Zantetsukened twice in a row with zero time to apply reraise.

Update: Seems to be related to having a PUP automaton tanking.