.kibana_2 is being created

Hi, sometimes after restarting or after upgrading from version 2.9 to 2.13 for example, the index .kibana_2 is being created and kibana is down.
im getting this error :
[resource_already_exists_exception]: index [.kibana_2/IWD2eiliQz2hQv24dGsxNw] already exists
and only after deleting the index kibana is going up
anyone know why is this happening?

@taltsafrir Are you connecting many OpenSearch Dashboards instances with the OpenSearch cluster?
Do you have any load balancer between OpenSearch Dashboards and OpenSearch?

I have 2 instances of opensearch dashboards
and no load balancer
@pablo