Is it possible to update the source code of a GCP Cloud Function in Terraform?

I use Terraform to manage resources of Google Cloud Functions. But while the inital deployment of the cloud function worked, further deploments with changed cloud function source code (the source archive sourcecode.zip) were not redeployed when I use terraform apply after updating the source archive.

The storage bucket object gets updated but this does not trigger an update/redeployment of the cloud function resource.

Is this an error of the provider? Is there a way to redeploy a function in terraform when the code changes?

The simplified source code I am using:

resource "google_storage_bucket" "cloud_function_source_bucket" {
  name                        = "${local.project}-function-bucket"
  location                    = local.region
  uniform_bucket_level_access = true
}

resource "google_storage_bucket_object" "function_source_archive" {
  name   = "sourcecode.zip"
  bucket = google_storage_bucket.cloud_function_source_bucket.name
  source = "./../../../sourcecode.zip"
}

resource "google_cloudfunctions_function" "test_function" {
  name                          = "test_func"
  runtime                       = "python39"
  region                        = local.region
  project                       = local.project
  available_memory_mb           = 256
  source_archive_bucket         = google_storage_bucket.cloud_function_source_bucket.name
  source_archive_object         = google_storage_bucket_object.function_source_archive.name
  trigger_http                  = true
  entry_point                   = "trigger_endpoint"
  service_account_email         = google_service_account.function_service_account.email
  vpc_connector                 = "projects/${local.project}/locations/${local.region}/connectors/serverless-main"
  vpc_connector_egress_settings = "ALL_TRAFFIC"
  ingress_settings              = "ALLOW_ALL"
}