Aerospike cluster - errors of counters

Quite often counters in cluster disappear. Why it happens i’m don’t understand. In github aerospike-client-go issues i’m had find this issue increment counter · Issue #12 · aerospike/aerospike-client-go · GitHub in the last commet talk about it, but what about solution?

We have an Aerospike cluster with 2 nodes, and 40 ruby unicorns with 32 workers using it.

I would suspect expiration or eviction.