terpenes?

Hello FC community!!! This is my first thread I post here :) as the title suggests, I ONLY vape for the terpenes. With my volcano I only load the bowl a pinch at a time (just enough to cover the screen) and with each subsequent bag I add another layer of herb to blow up in the bag. I guess...

I loaded a fresh bowl this morning and have been getting hit with a sour taste, which is throwing me off because sour weed is not something I was expecting. I’m way too high to be typing this shit. Has anyone ever had this happen before, and what were you experiencing flavor-wise?