No, I didn't try it out and do any consumption measurement.
But I look at the code, but from version I've merge recentyl, it does actually call the Espressif SDK.
Oh ! on Github, I see actually that there is a newer version. I will check this "_mode()" new function.
EDIT: Ok ! I saw you second post with Git issue #644. Then, maybe it is a bug on Espressif side.
Cheers for you efforts
Dans