Doveadm sync verbose not working?

[Plutocrat]

Hi

Was trying a sync with eg this. old is a host set up in my ssh config file. the user exists on both sides.
The sync completes correctly copying mails back and forth, but offers no feedback.
	doveadm sync -u user at domain.com -f -R remote:old

If I add -v I don't get any more information. Am I missing something? The manual says its meant to give more info and progress.
	doveadm -v sync -u user at domain.com -f -R remote:old

Putting -v elsewhere on the commandline results in an error, so I think its in the right place.

However -D works, but its a bit too verbose ...
	doveadm -D sync -u user at domain.com -f -R remote:old

dovecot --version
2.3.7.2 (3c910f64b)

P.