I
hear that but my bowl heats up with VA too , I used to freight train a lot more it’s gotten better since I started gently sipping and dropped my cadence down to a yard loader from a silver bulletA burn is heat induced, what you are experiencing is Tongue Bite, which is not a heat causing burn, but the PH balance of VAs, that cause this chemical reaction.
When in doubt, just dry VA blends really crispy, or fairly crisp, don’t pack tight, and sip slowly when smoking, and you’ll be right.