See SAP Note 2842859 – Possible Persistence Inconsistencies With SAP HANA 2 SPS04 Revisions 040.00 to 042.00
Due to a programming error in SAP HANA, it is possible that under specific conditions last modifications on pages might not be written to disk during a savepoint. This can lead to inconsistencies in the database persistence or data backup while the in-memory repesentation of the data is correct.