It's probably because the hardware was not designed to be operating at full power surrounded by insulation (i.e. in a bag). In that scenario the parts that the

It's probably because the hardware was not designed to be operating at full power surrounded by insulation (i.e. in a bag). In that scenario the parts that the hardware monitors may still be at 'acceptable' temperatures (which can be ~100C), while other (unmonitored) parts that would not normally get that hot get way too hot.