I always get a light hit on first draw. Never been different for me. Always flavor. Second hit is usually when it rips for me.
To me, a lighter hit on the first draw is common to many, many vapes and to a large degree depends on how moist/dry is your flower.
I rather think that on the first draw, I'm just drying out the rest of the water content and getting the load ready for draw #2 and on.
Just a thought
Let me be more specific about the "ghost" draw that I experience.
I usually get lots of vapor on the first draw of a new chamber. This is true with all of my Hoppers. The "ghost" draw only happens occasionally. It is significantly cooler than normal, and produces almost no vapor. In fact it produces almost no flavor either. This is not the material drying out, and it is not normal. It is an anomaly that occurs every now and then, even with the same Hopper, the same strain, and even the same batch of the same strain. I could vape dozens of chambers with the same material and same Hopper, and maybe once out of those dozens of chambers will I experience the "ghost" draw on the first hit.