.opendistro-alerting-alert* is working fine but its alias index is not working

Plugins Alerting
1

Hi All,

I have .opendistro-alerting-alert* as od alerting index.
I have created alias index as ‘hi’ 3 weeks before.

All alerts are getting stored in alias index.But before 2 days alias index is not getting updated with alerts while .opendistro-alerting-alert* is generating alerts.

What may be exact issue that alias index is not getting updated with alerts.

I guess may be the weekly rollover of .opendistro-alerting-alert* index.
Total .opendistro-alerting-alert* indices in the system.

.opendistro-alerting-alert-history-2021.08.19-1
.opendistro-alerting-alert-history-2021.08.20-000002
.opendistro-alerting-alert-history-2021.08.26-000003
.opendistro-alerting-alert-history-2021.09.02-000005
.opendistro-alerting-alert-history-2021.09.08-000006
.opendistro-alerting-alert-history-2021.09.15-000007

POST _aliases
{
  "actions": [
    {
      "add": {
        "index": ".opendistro-alerting-alert*",
        "alias": "hi"
      }
    }
  ]
}

Thank you in advance.