SMC Bug on ALL Haswell-based MacBooks (Pro and Air)

There is a current SMC bug in all haswell-based macbook pros that prevents temperating reporting apps (iStat Menus, etc.) to be unable to report temperatures when the CPU is in a low-power state (i.e. idling)
To replicate:
1. Make sure you are running the latest version of iStat Menus (5 or latest version of 4).
2. Notice the sensor data, temperatures, voltages etc.
3. If the notebook is running on AC power (i.e. is plugged into Magsafe) the CPU will automatically idling at a higher step value.
4. If the notebook is unplugged from AC power (i.e. is unplugged from Magsafe) the CPU will automatically idle at a very low step value (to conserve battery).
5. When the CPU is in this lowest idling state, several features of the SMC become unavailable too (i.e. the ability to read temperatures, voltages, etc. and write values to control fan speeds).
So, if unplug the magsafe, with light usage, you will notice your temperatures will "freeze" and report the same temperature indefinitely. Once you plug into AC power, the temperatures, sensors, etc. will begin to update again.
I am trying to get Apple to fix this. I have tested this on Late 2013 and Early 2014 Macbook Pro's and Air's, they all do this.

No... You are dead wrong.
This is a problem with Apple's code. Every piece of software that I have named has been updated to read the new "keys" for the new Macbook Pros. For some reason, when the CPU is in a low power state, the SMC actually powers down and refuses to respond. This is why those API calls are failing, the SMC has nothing to return. However, once the CPU speed steps up again to higher multipliers, the SMC turns back on (presumably to perform thermal management).
So before you start accusing me of accusing Apple, hear me out.
Before Haswell-based Macbooks, the SMC did not behave like this... How can this be the fault of the third-party developers?
I have been in contact with iStat Menu's developers for months now and they too have come to the same conclusion. There is nothing they can do to fix this as the problem lies at a very low level in the SMC.

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