I was trying to grind some NF's last night with a clanmate and could only finish about half the games. At the final boss fight about 1/3 times I used the well of radiance super, the frames dropped to <10 fps, blackscreen, disconnect to game servers and kick me to orbit. This happened about 6 times in one night, and only when using the super. (Also missed out on the completion rewards -.-). Cheers!