There’s a good chance that this problem has been already fixed in the Embedded Controller code on Github that will be included in the next BIOS update.
More information:
Sorry for the late reply due to a event over the last two weeks. After debugging and reviewing the prior EC code changes, I found a problem with the fan curve settings in the pass 2 EC versions when implementing the virtual temperature sensor. Even with the virtual temperature sensor disabled, it still impacts the fan curve. On a positive note, disabling the virtual temperature sensor does seem to allow the system to leave the 0.4GHz state a bit quicker. I’m now working with the thermal team to …
We’ve received positive feedback after reverting the fan settings on 13th Gen platforms, which has resolved the 400MHz issue. A similar fix for 12th Gen platforms is in progress and scheduled for release by the end of June.
Although I wouldn’t bet on a public Beta “by the end of June”…