Problem with shared after upgrade

[Yves]

Hi,

Old (and production) version :
dovecot --version
2.1.9

New version :
dovecot --version
2.3.16 (7e2e900c1a)


Exactly same configuration, for shared configuration :
namespace {
  list = children
  location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u
  prefix = shared/%%u/
  separator = /
  subscriptions = yes
  type = shared
}


But :
On Old version, with my imap client (Thunderbird), I see :
<account> / shared / <shared account> / INBOX
<account> / shared / <shared account> / all the others folders

On new version, I see :
<account> / shared / <shared account> / all the others folders

But not <account> / shared / <shared account> / INBOX


I debug it, and seem to be OK :
doveadm acl debug -u <account> shared/<shared account>/INBOX
doveadm(<account>): Info: Mailbox 'INBOX' is in namespace
'shared/<shared account>/'
doveadm(<account>): Info: Mailbox path: /home/dovecotmail/<shared
account>/Maildir
doveadm(<account>): Info: All message flags are shared across users in
mailbox
doveadm(<account>): Info: User <account> has rights: lookup read write
write-seen write-deleted insert post expunge create delete admin
doveadm(<account>): Info: Mailbox found from dovecot-acl-list
doveadm(<account>): Info: User <shared account> found from ACL shared dict
doveadm(<account>): Info: Mailbox shared/<shared account>/INBOX is
visible in LIST

And in debug log :
Oct 23 12:35:01 imap(<account>)<18244><IrkoZALP4eRQfHif>: Debug: Mailbox
shared/<shared account>: Rotated transaction log
/home/dovecotmail/<account>/Maildir/shared/<shared
account>/.INBOX/dovecot.index.log (seq=982, reset=no)
Oct 23 12:35:01 imap(<account>)<18244><IrkoZALP4eRQfHif>: Debug: Mailbox
shared/<shared account>: Recreated
/home/dovecotmail/<account>/Maildir/shared/<shared
account>/.INBOX/dovecot.index (file_seq=982) because: .log file format
version 1.2 is too old

Debug is ok for me ?

Any idea ?

Thanks