cannot get shared mailbox info in JMAP session

[email protected]
Newsgroups gmane.mail.imap.cyrus
Message-ID <[email protected]>
I can get shared mailbox in IMAP list or lsub command

I can get shared mailbox info in JMAP Mailbox/get command with shared accountId 

But session endpoint returns my account only.

Are there some configs I missed?
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Cyrus: Info
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