screen turning super bright then graphics freezing

Some effect is causing the screen to turn super bright (maybe a tactical nuke) and the game graphics completely freeze. The sound keeps going and the druid (on PC) I am playing with is not having issues other than crying watching me die.

I log back in and everything is fine for an hour or so, then it happens again. I have not noticed any pattern as to any attack, spell, enemy or area that is causing it, unfortunately.

This is what it looks like every time.

Having the same thing. Have videos saved on xbox prior to freezing and it doesnt appear to be any specific skill. Both times were in boss fights for me though.