#1 - March 14, 2016, 9:57 p.m.
http://www.twitch.tv/automaticjak/v/54316026?t=31m11s
Asked around and another Disc Priest who was testing also found in his logs where PW:Rad bugged out for him, but applied 6 times!
https://www.warcraftlogs.com/reports/3aLFyWp982nqKrYj#type=auras&boss=-3&pins=0%24Separate%24%23ff00f7%24casts%240%240.0.0.Any%2456725.0.0.Priest%24true%240.0.0.Any%24false%24194509&ability=194384&view=events&start=903712&end=925402