Solution : https://service.sap.com/sap/support/notes/694559 (SAP Service marketplace login required)
Key words :
central data cache reason, central data cache, alert/cache/size_mb, support package mentioned, update data, subtrees disappear, hierarchy display, tree display, terms rz20, subtrees lose
Related Notes :
| 501746 | RZ20: Central data cache: Composite SAP Note |