You setup replication of tables with LOB columns. All data except LOB data is replicated.
LOGGING of LOB data is not enabled. Therefore the LOB data is never in the redo logs. Check that the chunk_size and block_size are equal. The chunk size must be equal to the DB_BLOCK_SIZE
Issue following statement in SQL and check that the chuck size equal db_block_size AND logging equal YES.
SQL> select owner, table_name, chunk, logging, in_row from dba_lobs where owner = '<owner>' and table_name = '<tablename>';
See KB article 25421