Steps:

1. Edit content, e.g. Article.
2. Change title.
3. Click Preview button. -> Title is updated.
4. Click Back button.
5. Change short title.
6. Click Preview button. -> Short title is not updated.
7. Publish.

Result: Preview in Quick preview tab, Site context and using preview button it's not updated. https://recordit.co/iVGKSlUZMb

Expected result: All previews are up to date.

Note: Issue occurs from 4.5 but on 4.6 it affetcs new preview features.