Welp, my microdosing scale was dead dead dead. We thank it for it's long service given how cheap it was. I've put it into the "resurrect somehow" pile with my electronics projects.
That said, I put a very tiny amount into dosing capsules, like barely enough to cover the screen on the bottom. Something like I'd think you'd be loading. Like you, it's inconsistent vapor or, more likely, just so little vapor from so little amount that you feel like you aren't getting anything.
Sage advice.
OP, I loaded 0.02 grams in a POTV Lobo capsule and got a nice extraction. This was 430° F through a stem, I usually use it at home with a dry water piece, and it was a little hot, but part of the process is figuring out what works best for each situation.
Forgot to take a photo when it was loaded in the capsule, but it's really a tiny amount.
You had the right idea of it by bumping up the temps. At my normal temps, it too much air passed by the herb to properly heat it.
