I can not find the post about build 17120.1, have not published it yet?

Yes, there are multiple issues with this, another person mentions this on Twitter.
And this is the comment in the Feedback hub: https://aka.ms/F9lgkt

I read (almost always) the list of general changes, improvements, and fixes for PC of all the builds and in none of them says anything about the sleep problem, many people on Twitter have written...

Same here, I have made clean installations of all the builds since 17107 and, in my case, that doesn't fix the problem, the amount of comments about this in the Feedback hub is, I would say,...