What is the cache group you are using ? If it is on demand cache group check the option "partition by requester and device ID" in the properties of cache group created. If there is any load parameter in the MBO map it with PK with "partition by requester and device ID" checked or map it with sync parameter.
You can check whether CDB is updated by following this blog, How to access SUP CDB (Cache Database) ?
The issue would be with the cache group you selected.
Midhun VP