Contacted Apple, fo which I have to sign up(!).
Posted this: After installing 10.13.4 my macbook never goes into sleep anymore but reboots instead all the time.
I hear and read that severla people have now this issue, but no information at all to be found.
I had similar problems with earlier updates (but not all the time and the issues disappeared).
I found this information: Apple's magical quality engineering strikes again: You may want to hold off that macOS High Sierra update... • The Regis…
Please undo whatever you put in that update to avoid this. I use this Macbook for my business!
When I want to submit I get this:
You are not allowed to create or update this content.