Disconnecting users from mailbox (due to a password change, for instance)

Good morning, 

We have a feature that allows a user to kill all it's sessions. Imagine
a cellphone gets stolen. The user could disconnect it's sessions from
our interface. 

It normally works fine. We just launch a kill TERM to the user's
imap/pop processes mainly. But I have seen a couple of times, that after
doing that, no user can later connect to it's mailbox. It's like, if
something  important would become locked... some important database or
similar, by that killed processes that obviously as have become killed,
won't unlock that hypothetical important database. Have you ever seen a
behavior like the commented?. 

Perhaps, does Cyrus have another "more elegant" way of logging out a
user?. 

Best regards,
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Cyrus: Info
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