[grietti]

Update:
Sorry, I just found out that the stated behaviour does not depend on Nirvana or any other specific theme.
It was caused by a string of blanks or nonprinting characters that somehow was introduced in all post_excerpt fields in the database as posts were copied from the test site to the production site.
Thus the post was deemed to have a manual excerpt but no output occurred as all blanks were stripped away.
You can close the ticket.

[Author]

Posts