Once in a while receiving "security_exception" form opensearch using aiven kafka connector

I'm using aiven kafka connector to opensearch (version 2.12.0 ), and using data stream to ingest data to different indeices, it works well however once in a while kakfa connector tasks fails with error: "security_exception", when I stop the connector and resume it, it starts working untill receiving the same error after some days.

`{
"name": "iot-node-data-sink",
"connector": {
"state": "RUNNING",
"worker_id": "ip-172-xx-xx-xx.eu-central-1.compute.internal:8083"
},
"tasks": [
{
"id": 0,
"state": "FAILED",
"worker_id": "ip-172-xx-xx-xx.eu-central-1.compute.internal:8083",
"trace": "org.apache.kafka.connect.errors.ConnectException: Exiting WorkerSinkTask due to unrecoverable exception.\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:632)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:350)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:250)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:219)\n\tat org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:204)\n\tat org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:259)\n\tat org.apache.kafka.connect.runtime.isolation.Plugins.lambda$withClassLoader$1(Plugins.java:236)\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\nCaused by: org.apache.kafka.connect.errors.ConnectException: Non-repeatable exception trown by bulk processing\n\tat io.aiven.kafka.connect.opensearch.RetryUtil.callWithRetry(RetryUtil.java:127)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.execute(BulkProcessor.java:398)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.call(BulkProcessor.java:370)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.call(BulkProcessor.java:351)\n\t... 4 more\nCaused by: OpenSearchStatusException[OpenSearch exception [type=security_exception, reason=Unexpected exception indices:data/write/bulk]]\n\tat org.opensearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:209)\n\tat org.opensearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:2235)\n\tat org.opensearch.client.RestHighLevelClient.parseResponseException(RestHighLevelClient.java:2212)\n\tat org.opensearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1931)\n\tat org.opensearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1884)\n\tat org.opensearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1852)\n\tat org.opensearch.client.RestHighLevelClient.bulk(RestHighLevelClient.java:371)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.lambda$execute$0(BulkProcessor.java:401)\n\tat io.aiven.kafka.connect.opensearch.RetryUtil.callWithRetry(RetryUtil.java:119)\n\t... 7 more\n\tSuppressed: org.opensearch.client.ResponseException: method [POST], host [https://opensearch-nodes.xxxxxx.de], URI [/_bulk?timeout=1m], status line [HTTP/1.1 500 Internal Server Error]\n{\"error\":{\"root_cause\":[{\"type\":\"security_exception\",\"reason\":\"Unexpected exception indices:data/write/bulk\"}],\"type\":\"security_exception\",\"reason\":\"Unexpected exception indices:data/write/bulk\"},\"status\":500}\n\t\tat org.opensearch.client.RestClient.convertResponse(RestClient.java:375)\n\t\tat org.opensearch.client.RestClient.performRequest(RestClient.java:345)\n\t\tat org.opensearch.client.RestClient.performRequest(RestClient.java:320)\n\t\tat org.opensearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1918)\n\t\t... 12 more\n"
}
],
"type": "sink"
}`

other task error:
`{
"name": "mqtt-opensearch-sink",
"connector": {
"state": "RUNNING",
"worker_id": "ip-172-xx-xx-xx.eu-central-1.compute.internal:8083"
},
"tasks": [
{
"id": 0,
"state": "FAILED",
"worker_id": "ip-172-xx-xx-xx.eu-central-1.compute.internal:8083",
"trace": "org.apache.kafka.connect.errors.ConnectException: Exiting WorkerSinkTask due to unrecoverable exception.\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:632)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:350)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:250)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:219)\n\tat org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:204)\n\tat org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:259)\n\tat org.apache.kafka.connect.runtime.isolation.Plugins.lambda$withClassLoader$1(Plugins.java:236)\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\nCaused by: org.apache.kafka.connect.errors.ConnectException: Non-repeatable exception trown by bulk processing\n\tat io.aiven.kafka.connect.opensearch.RetryUtil.callWithRetry(RetryUtil.java:127)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.execute(BulkProcessor.java:398)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.call(BulkProcessor.java:370)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.call(BulkProcessor.java:351)\n\t... 4 more\nCaused by: OpenSearchStatusException[OpenSearch exception [type=security_exception, reason=Unexpected exception indices:data/write/bulk]]\n\tat org.opensearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:209)\n\tat org.opensearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:2235)\n\tat org.opensearch.client.RestHighLevelClient.parseResponseException(RestHighLevelClient.java:2212)\n\tat org.opensearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1931)\n\tat org.opensearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1884)\n\tat org.opensearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1852)\n\tat org.opensearch.client.RestHighLevelClient.bulk(RestHighLevelClient.java:371)\n\tat io.aiven.kafka.connect.opensearch.BulkProcessor$BulkTask.lambda$execute$0(BulkProcessor.java:401)\n\tat io.aiven.kafka.connect.opensearch.RetryUtil.callWithRetry(RetryUtil.java:119)\n\t... 7 more\n\tSuppressed: org.opensearch.client.ResponseException: method [POST], host [https://opensearch-nodes.xxxxxx.de], URI [/_bulk?timeout=1m], status line [HTTP/1.1 500 Internal Server Error]\n{\"error\":{\"root_cause\":[{\"type\":\"security_exception\",\"reason\":\"Unexpected exception indices:data/write/bulk\"}],\"type\":\"security_exception\",\"reason\":\"Unexpected exception indices:data/write/bulk\"},\"status\":500}\n\t\tat org.opensearch.client.RestClient.convertResponse(RestClient.java:375)\n\t\tat org.opensearch.client.RestClient.performRequest(RestClient.java:345)\n\t\tat org.opensearch.client.RestClient.performRequest(RestClient.java:320)\n\t\tat org.opensearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1918)\n\t\t... 12 more\n"
}
],
"type": "sink"
}`