Post-shrink shards always end up on same nodes

[jasonrojas]

We recently implemented a shrink state in our index policy to optimize storage post index roll-over and noticed something interesting, Once the index is “shrunk” (down from N+1 shards to 1+1) the new index retains a setting:

        "routing": { - 
          "allocation": { - 
            "initial_recovery": { - 
              "_id": "Qldd4ZvkSKGqfU-h3jZgbw"
            }
          }
        },

Which always forces the new primary and its replica onto the same two nodes, over the last few days none of these shards have re-balanced to other nodes and because of it I have a very un-even storage utilization on two nodes in comparison to the rest of the cluster.
Is this expected?
Are there any settings I am missing to remove that routing.allocation.initial_recovery setting so the shards can re-distribute?

Thanks.
(Full ISM policy below)

{
    "id": "rollover",
    "seqNo": 34459949,
    "primaryTerm": 38,
    "policy": {
        "policy_id": "rollover",
        "description": "A sample description of the policy",
        "last_updated_time": 1709327935258,
        "schema_version": 21,
        "error_notification": {
            "channel": {
                "id": "cZICrYEB_9J1zuttzC3B"
            },
            "message_template": {
                "source": "The index {{ctx.index}} failed during policy execution.",
                "lang": "mustache"
            }
        },
        "default_state": "rollover",
        "states": [
            {
                "name": "rollover",
                "actions": [
                    {
                        "retry": {
                            "count": 3,
                            "backoff": "exponential",
                            "delay": "1m"
                        },
                        "rollover": {
                            "min_size": "100gb",
                            "min_index_age": "1d",
                            "copy_alias": false
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "reduce_replicas"
                    }
                ]
            },
            {
                "name": "reduce_replicas",
                "actions": [
                    {
                        "retry": {
                            "count": 3,
                            "backoff": "exponential",
                            "delay": "1m"
                        },
                        "replica_count": {
                            "number_of_replicas": 0
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "shrink_shards"
                    }
                ]
            },
            {
                "name": "shrink_shards",
                "actions": [
                    {
                        "retry": {
                            "count": 3,
                            "backoff": "exponential",
                            "delay": "1m"
                        },
                        "shrink": {
                            "num_new_shards": 1,
                            "target_index_name_template": {
                                "source": "{{ctx.index}}_shrunken",
                                "lang": "mustache"
                            },
                            "aliases": [
                                {
                                    "logstash": {
                                        "is_write_index": null
                                    }
                                }
                            ],
                            "switch_aliases": true,
                            "force_unsafe": true
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "delete_multi_primary"
                    }
                ]
            },
            {
                "name": "delete_multi_primary",
                "actions": [
                    {
                        "retry": {
                            "count": 3,
                            "backoff": "exponential",
                            "delay": "1m"
                        },
                        "delete": {}
                    }
                ],
                "transitions": []
            }
        ],
        "ism_template": [
            {
                "index_patterns": [
                    "logstash-*"
                ],
                "priority": 1,
                "last_updated_time": 1656463404326
            }
        ]
    }
}