Hello Josh,
While I have my surface pro 4 software update done, however my SP4 still suffered the over heating issues yesterday while in sleep mode. Normally when you closed the keyboard cover it will just go sleep and won't turn back on unless you push the power key,
but yesterday for no reason it starts over heating with fans on full blast in my cover.
You know this will severely degrade the components life, such as CPU, Memory and battery. Not only that, there is a fire hazard should the battery explode under heat. I can't imagine you guys have no fix this issue yet, it's been close to mid cycle for this
surface pro already. If you guys can't solve the problem, I strongly suggest you encourage Microsoft do a recall before anyone get seriously hurt or property damage and destruction.