Here's the scenario:
Given 2 nodes with REPL_SYNC cache with passivating cache store (e.g. default web cache in AS7).
1. Create cache entry containing atomic map with 2 map entries on node1.
2. Passivate that cache entry on node2 via manual evict.
3. Modify 1 of the atomic map entries within the cache entry on node1.
4. Lookup atomic map on node2. It only contains 1 map entry - the map entry modified in step 3. The other map entry is lost.