We were first getting UIDs in a transaction with a lock. Then getting the
changes and processing them in a special way. And then processing for qresync
in a new transaction. The special processing of changes is now gone, it seems
to have skipped adding/removing uids to the session, which can't be correct.
The new approach is just using a lock and transaction and process the whole
opening of the mailbox, and not processing any changes as part of the open, and
getting rid of the special "initial" mode processing a mailbox.
af3e9351bc