LibreOffice doesn't display tables with more than 41 records, even when using the :oo subprotocol. Workaround is to specify defaultHoldable=true in the connection string. The reason seems to be that LibreOffice caches 41 records, and uses the ResultSet when you scroll to record 42 or further (which is then already closed).
Either the protocol must use defaultHoldable=true by default, or we need to investigate how to address this specific problem.
See also: https://groups.yahoo.com/neo/groups/Firebird-Java/conversations/messages/11096