Thanks everyone for the additional reports and commentary about this over the past few days. I don’t want to go too into the weeds about this, but in an effort to be transparent and accurate, I did want to call out an error that we made in our previous post about this:
However, we discovered that this is true only if the spell or ability that triggered the GCD was flagged as a magic-based attack (or more specifically, spells flagged in our data with a defense category of “magical”).
This means that most physical abilities or spells that incur the GCD will not block these procs from firing while the GCD is in effect. An example of this is a Warrior’s Hamstring ability. This has a defense category of “physical”, thus you can still see Nightfall procs occur while you are on GCD following the usage of Hamstring.