LarkBox Pro: Event viewer - Idle power management features are disabled

Event viewer is logging the following error 4 times, once for each core, on every reboot:

“Idle power management features on processor 0 in group 0 are disabled due to a firmware problem. Check with the computer manufacturer for updated firmware.”

This is after clean installing W10 20H2 and both before and after adding back the ‘Intel Dynamic Platform and Thermal Framework’ drivers linked elsewere on these forums.

Is this a BIOS issue? Could this be an issue due to my 20H2 install, or are people on (stock) 1909 also seeing this?