This is getting weird. I no longer hibernate the PC explicitly, but just shut the lid to make it sleep. But as of a few days ago, overnight it enters hibernate anyway. There's plenty of battery capacity in the morning. And the new Surface Pro takes a long time to reload, much longer than my Surface 7 did.
The good news is, so far, the keyboard comes up responsive.
Has anyone else seen this? I'll try resetting the power button to Sleep and see if that makes a difference.