doveadm mailbox list

It's quite likely I'm doing it wrong, but...

Given a valid mailbox...

doveadm mailbox list -u <username> realmb returns "realmb"

doveadm mailbox list -u <username> real* returns "realmb"

Seems reasonable. Now, with a non-existent mailbox... doveadm mailbox list -u <username> bogus returns "bogus"

doveadm mailbox list -u <username> bogus* returns ""

Is this a bug or correct behavior?

-- Daniel