[Bug]: Cannot move dashboard to another folder

[dmanc]

Grizzly Version

v0.7.1

Expected Behavior

grr apply grr.jsonnet
Applying 2 resources
DashboardFolder.sample updated
Dashboard.prod-overview updated
2 resource updated

Actual Behavior

grr apply grr.jsonnet
Applying 2 resources
DashboardFolder.sample updated
Dashboard.prod-overview unchanged
1 resource updated, 1 resource unchanged

Steps to Reproduce

Using dashboard-simple.libsonnet, folder-simple.libsonnet, and grizzly/grizzly.libsonnet from the examples directory.

local dashboard = import 'dashboard-simple.libsonnet';
local folder = import 'folder-simple.libsonnet';
local grr = import 'grizzly/grizzly.libsonnet';
{
  folders: [
    grr.folder.new('sample', 'Sample'),
  ],
  dashboards: [
    grr.dashboard.new('prod-overview', dashboard)
  ],
}

Running grr apply grr.jsonnet creates a folder called Sample and a dashboard in the default location.

Changing grr.jsonnet to

local dashboard = import 'dashboard-simple.libsonnet';
local folder = import 'folder-simple.libsonnet';
local grr = import 'grizzly/grizzly.libsonnet';
local encoder = import 'eigenda/encoder/main.libsonnet';
{
  folders: [
    grr.folder.new('sample', 'Sample'),
  ],
  dashboards: [
    grr.dashboard.new('prod-overview', dashboard)
    + grr.resource.addMetadata('folder', 'sample'),
  ],
}

Shows the following diff

Dashboard.prod-overview changes detected:
--- Remote
+++ Local
@@ -1,7 +1,7 @@
 apiVersion: grizzly.grafana.com/v1alpha1
 kind: Dashboard
 metadata:
-    folder: general
+    folder: sample
     name: prod-overview
 spec:
     schemaVersion: 17

but applying it leaves the dashboard unchanged.

grr apply grr.jsonnet
Applying 2 resources
DashboardFolder.sample updated
Dashboard.prod-overview unchanged
1 resource updated, 1 resource unchanged

Is this type of action supported?