Bicep module outputs wrong resource id

Question

I have subscription scoped bicep deployment, including some modules to create content for resource group. In one module I create VNET and I try to get back its resource ID output vnetId string = vnet.id, on another module I'd like to use this value and I have set properly the dependsOn. But there is problem, seems the output ID doesn't contain resource groups part /subscriptions/<subs>/providers/Microsoft.Network/virtualNetworks/vnet-weu/subnets/portal

Does it have something with using subscription level deployment? (az deployment sub create ...)

UPDATE: I just found this remark, which does explain the missing resource group part, but does not explain why vnet.id in module with targetScope = 'resourceGroup' returns subscription resource id instead of "full" resource id.

UPDATE - CODE

network.bicep

targetScope = 'resourceGroup'

param vnetName string
param location string = resourceGroup().location

resource vnet 'Microsoft.Network/virtualNetworks@2020-11-01' = {
  name: vnetName
  location: location
  ... 
}

output vnetId string = vnet.id

main.bicep

targetScope = 'subscription'


module networkRgResources 'network.bicep' = {
  name: 'networkRgResources'
  scope: resourceGroup(networkRg.name)
  params: {
    location: location
    vnetName: vnetName
  }
}

module sharedRgResources 'shared.bicep' = {
  name: 'sharedRgResources'
  scope: resourceGroup(sharedRg.name)
  params: {
    vnetId: networkRgResources.outputs.vnetId
  }
  dependsOn: [
    networkRgResources
  ]
}

inside shared module the vnetId is without resource groups

UPDATE 2 I cannot simulate this, but seems I have some strange race conditions in my code, now it seems it is working fine.