Lost of indices on small single node cluster

Hello All,

We are running into issue where all our indices are lost after certain period, a month to be precise. We have small instance with single node cluster. We have couple of indices. In last 2 weeks we can see 4 different nodes getting created at different times. only one of them is currently active. Also we don’t have any ILM policies applied to any of the index.

We didn’t any configuration changes or any other that would result into blue-green deployment of the cluster.

What could be reason behind following ?
a. Blue-green deployment getting initiated on our cluster
b. Multiple data nodes
c. Indices getting lost

We believe all these scenarios are somehow connected.

Appreciate any help on this.