Hello, I had the same issues with my WooCommerce site and it started exactly 24 hours ago. No changes to the site.
1 hour ago I received the first admin e-mail again though (“New Customer Order…”) so I guess it has been fixed? I’m still not sure exactly and it could be that only that one e-mail got through.
There haven’t been any changes made and everything else is working and is up to date. I am using Flatsome + Siteground as hoster.
Hope it stays fixed and we can find out what the issue was, because this is a very scary problem when customers aren’t receiving admin e-mails all of a sudden.
