Creation of PostgreSQL replica server after point-in-time restore fails with timeout

Sorry, I couldn't find any place to report this issue.
Please correct me if there is more suitable resource for Azure bugs.

Preconditions
We have Azure PostgreSQL server X with replica server Y.
In case of emergency with Azure PostgreSQL server X we want to:

1. Restore backup via Point-In-Time to new server X2;
2. Recreate replica server with the same name Y from X2 server.

Expected result
The PostgreSQL replica server should be create successfully.

Actual result
Creation process fails with timeout after 1 hour:

Restore server...
{- Finished ..
  "administratorLogin": "dbadmin",
  "byokEnforcement": "Disabled",
  "earliestRestoreDate": "2020-10-21T18:39:56.803000+00:00",
  "fullyQualifiedDomainName": "psql-server-restored.postgres.database.azure.com",
  "id": "/subscriptions/.../resourceGroups/.../providers/Microsoft.DBforPostgreSQL/servers/psql-server-restored",
  "identity": null,
  "infrastructureEncryption": "Disabled",
  "location": "westus",
  "masterServerId": "",
  "minimalTlsVersion": "TLSEnforcementDisabled",
  "name": "psql-server-restored",
  "privateEndpointConnections": [],
  "publicNetworkAccess": "Enabled",
  "replicaCapacity": 5,
  "replicationRole": "None",
  "resourceGroup": "...",
  "sku": {
    "capacity": 2,
    "family": "Gen5",
    "name": "GP_Gen5_2",
    "size": null,
    "tier": "GeneralPurpose"
  },
  "sslEnforcement": "Enabled",
  "storageProfile": {
    "backupRetentionDays": 7,
    "geoRedundantBackup": "Disabled",
    "storageAutogrow": "Enabled",
    "storageMb": 102400
  },
  "tags": null,
  "type": "Microsoft.DBforPostgreSQL/servers",
  "userVisibleState": "Ready",
  "version": "11"
}
Create replica...
 - Running ..
Long-running operation wait cancelled.

Steps to reproduce

#!/bin/bash
set -o errexit

# PLEASE put your subscription id, resource group and server name to reproduce bug
subscriptionId=""
resourceGroup="myResourceGroup"
sourceServerName="psql-server"

sourceServerId="/subscriptions/${subscriptionId}/resourceGroups/${resourceGroup}/providers/Microsoft.DBforPostgreSQL/servers/${sourceServerName}"
restoredServerId="/subscriptions/${subscriptionId}/resourceGroups/${resourceGroup}/providers/Microsoft.DBforPostgreSQL/servers/${sourceServerName}-restored"

echo "Restore server..."
az postgres server restore \
    --resource-group "$resourceGroup" --subscription "$subscriptionId" \
    --name "${sourceServerName}-restored" --source-server "${sourceServerName}" \
    --restore-point-in-time "2020-10-22T01:00:00+07:00"

echo "Create replica..."
az postgres server replica create \
    --resource-group "$resourceGroup" --subscription "$subscriptionId" \
 --name "${sourceServerName}-replica" --source-server "$restoredServerId"

Additional context
This bug can be reproduced via Azure REST API.
I can't find info about replica server on Azure Portal.
Status of this operation is "Started" in "Activity log".

Workaround
Wait 5 minutes after that source server is restored.

Environment
Windows 10, WSL, Ubuntu 18.04
Azure CLI version

$ az version
{
  "azure-cli": "2.12.1",
  "azure-cli-core": "2.12.1",
  "azure-cli-telemetry": "1.0.6",
  "extensions": {}
}