DependsOn Failing in ARM Template

Im trying to connect our website to a Application Insights component via ARM but havning troubles in setting the Intstrumentation Key as an website application setting. This works sometimes and sometimes not.

My guess is that i m having incorrect dependsOn settings. Can anyone have a look on my template and see if i m doing something wrong? Have a look on the resource called "appSettings" of type "config" in the website resource. Here I am supposed to wait for completion of the Application Insight and then read the Instrumentation Key.

 {
  "name": "[variables('webAppNameFinal')]",
  "type": "Microsoft.Web/sites",
  "location": "[parameters('appServicePlanLocation')]",
  "apiVersion": "2015-04-01",
  "dependsOn": [
    "[concat('Microsoft.Web/serverfarms/', variables('appServicePlanNameFinal'))]"
  ],
  "tags": {
    "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/', variables('appServicePlanNameFinal'))]": "Resource",
    "displayName": "webApp"
  },
  "properties": {
    "name": "[variables('webAppNameFinal')]",
    "serverFarmId": "[variables('appServicePlanNameFinal')]"
  },
  "resources": [
    {
      "apiVersion": "2015-04-01",
      "name": "connectionstrings",
      "type": "config",
      "dependsOn": [
        "[resourceId('Microsoft.Web/Sites', variables('webAppNameFinal'))]",
        "[resourceId('Microsoft.Sql/servers', variables('sqlServerNameFinal'))]"
      ],
      "properties": {
        "Watches": {
          "value": "[concat('Server=tcp:', reference(concat('Microsoft.Sql/servers/', variables('sqlServerNameFinal'))).fullyQualifiedDomainName, ',1433;Database=', variables('sqlDatabaseNameFinal'), ';User ID=', parameters('sqlServerAdminLogin'), ';Password=', parameters('sqlServerAdminLoginPassword'), ';Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;')]",
          "type": "SQLAzure"
        }
      }
    },
    {
      "apiVersion": "2015-08-01",
      "name": "appsettings",
      "type": "config",
      "dependsOn": [
        "[resourceId('Microsoft.Web/Sites', variables('webAppNameFinal'))]",
        "[concat('Microsoft.Insights/components/', variables('applicationInsightsNameFinal'))]"
      ],
      "properties": {
        "Watches.Webjobs.VitecConnect.WatchersExport.Run": "false",
        "ApplicationInsights.InstrumentationKey": "[reference(concat('Microsoft.Insights/components/', variables('applicationInsightsNameFinal'))).InstrumentationKey]"
      }
    },
    {
      "apiVersion": "2015-04-01",
      "name": "web",
      "type": "sourcecontrols",
      "dependsOn": [
        "[resourceId('Microsoft.Web/Sites', variables('webAppNameFinal'))]"
      ],
      "properties": {
        "RepoUrl": "[parameters('gitUrl')]",
        "branch": "[parameters('gitBranch')]"
      }
    },
    {
      "apiVersion": "2015-08-01",
      "name": "web",
      "type": "config",
      "dependsOn": [
        "[resourceId('Microsoft.Web/Sites', variables('webAppNameFinal'))]"
      ],
      "properties": "[variables('siteProperties')]"
    }
  ]
},
{
  "name": "[variables('applicationInsightsNameFinal')]",
  "type": "Microsoft.Insights/components",
  "location": "Central US",
  "apiVersion": "2014-04-01",
  "dependsOn": [ ],
  "tags": {
    "displayName": "Application Insights"
  },
  "properties": {
    "applicationId": "[variables('webAppNameFinal')]"
  }
},