Guild Wars 2

In episode “Seeds of truth” in “no refuge” instance, food and utility effects don’t have any effect anymore. I was using “Bowl of Seaweed Salad” and “Powerful Potion of Centaur Slaying”. I did not receive any swiftness (after killing plenty centaurs). After testing with different utility effects it also seemed like I did not take/deal 10% less/more damage from/to the centaurs.
I know a few months ago food and utility were working fine (i did some testing to optimize damage in- and output), so i can eliminate the centaurs not being “centaur-enemy-type”.

I will do further research, if this indeed effect more living story instances, the “Caithe-transformed” ones or only “no refuge”.

Question: Is this be intentional?

If you bring a stacking sigil do you get any stacks?