3428337 - Table BC_MSG has a very large LOB space even though the default delete Job is running regularly

The disk size of table BC_MSG is growing rapidly (more than 100GB per day) even though setting the retention to 5 days as per SAP Note 872388. 
Running delete job daily but it is not releasing the disk space at DB level.

Checking the monitor view M_TABLE_LOB_STATISTICS for the size of LOB columns in table BC_MSG , it is found that column MSG_BYTES occupied a very large disk space: 

For example: 

SCHEMA_NAME TABLE_NAME    COLUMN_NAME                    LOB_TYPE    DISK_GB  BINARY_GB  LOB_COUNT
=========== ============= ============================== ======== ========== ========== ==========
SAPJAVA1    BC_MSG        DSR_PASSPORT                   PACKED         0.00       0.00          0
SAPJAVA1    BC_MSG        MSG_BYTES                      PACKED         0.06       0.03      15677
SAPJAVA1    BC_MSG        MSG_BYTES                      FILE        1400.03    1305.52    3906406
SAPJAVA1    BC_MSG        PP_HASH                        PACKED         0.00       0.00          0
SAPJAVA1    BC_MSG        TRAN_HEADER                    PACKED         0.00       0.00          0

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

SAP NetWeaver 7.5
SAP HANA DATABASE PLATFORM 2.0

BC_MSG, LOB, MSG_BYTES , KBA , HAN-DB-PER , SAP HANA Database Persistence , BC-XI-CON-MSG , Messaging System , Problem