Symbolic name template codegen dependsOn statements not generated correctly for "existing" resources

[anthony-c-martin]

Repro:

resource foo1 'Microsoft.Storage/storageAccounts@2022-09-01' = {
  name: 'foo'
}

resource foo2 'Microsoft.Authorization/roleAssignments@2022-04-01' existing = {
  scope: foo1
  name: 'blah'
}

resource foo3 'Microsoft.Storage/storageAccounts@2022-09-01' = {
  name: 'foo3'
  properties: {
    accessTier: foo2.properties.updatedBy
  }
}

Generates:

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "languageVersion": "1.10-experimental",
  "contentVersion": "1.0.0.0",
  "metadata": {
    "_EXPERIMENTAL_WARNING": "Symbolic name support in ARM is experimental, and should be enabled for testing purposes only. Do not enable this setting for any production usage, or you may be unexpectedly broken at any time!",
    "_generator": {
      "name": "bicep",
      "version": "0.16.1.55165",
      "templateHash": "12852337686590580900"
    }
  },
  "resources": {
    "foo1": {
      "type": "Microsoft.Storage/storageAccounts",
      "apiVersion": "2022-09-01",
      "name": "foo"
    },
    "foo2": {
      "existing": true,
      "type": "Microsoft.Authorization/roleAssignments",
      "apiVersion": "2022-04-01",
      "scope": "[format('Microsoft.Storage/storageAccounts/{0}', 'foo')]",
      "name": "blah",
      "dependsOn": [
        "foo1"
      ]
    },
    "foo3": {
      "type": "Microsoft.Storage/storageAccounts",
      "apiVersion": "2022-09-01",
      "name": "foo3",
      "properties": {
        "accessTier": "[reference('foo2').updatedBy]"
      },
      "dependsOn": [
        "foo1"
      ]
    }
  }
}

My expectation is for foo3's dependsOn to reference foo2 rather than foo1.

[jeskew]

Wouldn't the [reference('foo2').updatedBy] expression create an implicit dependency? I would think the dependsOn property in foo3 is redundant since a by-name reference to foo2 is used.