Queries that use sort may end up in infinite loop

When result rows to queries such as

SELECT .. WHERE [ns:property1] = 'A' AND [ns:property2] = 'B' ORDER  BY ['ns:property3']

are filtered in query SELECT phase so that the first returned batch is empty, BufferedSequence.loadAll() returns batch size zero, which causes an infinite loop in SortingSequence that now tries to fetch result rows in empty batches.