Live Preview only works with published entries We have a site where Live Preview only works with entries that have been previously published. When trying to preview entries we're working on (or drafts), we see either the latest entry for that section instead - or sometimes the correct entry template but with other/missing data in it.

Puzzled as to what is going on. There are no console errors.
My understanding is you have to save an entry first before you can use live preview.

Brandon says as much in his answer here as well:
https://craftcms.stackexchange.com/a/12091/103