Cannot see Node exporter metrics when using the node exporter mixin

[Rinceri]

Hi there, I am trying to customise my Grafana to sort all the dashboards to their respective folders. I noticed that the main.libsonnet simply uses mixins to display the dashboards in "default" folder.

I decided to make a custom mixin for each of the categories it includes (such as alert manager, grafana, k8s, node exporter, etc) using addMixin and set the dashboardFolder respectively.

Now everything is displaying properly except for the dashboards provided by the node exporter mixin. Any of them! For example, node exporter / AIX and node exporter / Nodes both show metrics correctly in the default dashboard config, but when I display them through a mixin (i.e. in its folder), the panels in these dashboards show no data.

My configuration jsonnet:

...
local NodeExporterMixin = addMixin({
  name: 'node-exporter-mixin',
  dashboardFolder: 'Node-Exporter',
  mixin: (import 'github.com/prometheus/node_exporter/docs/node-mixin/mixin.libsonnet')
});

local kp =
  (import 'kube-prometheus/main.libsonnet') + (import 'kube-prometheus/addons/node-ports.libsonnet') +
  {
    values+:: {
      common+: {
        namespace: 'monitoring',
      },

      // taken from github.com/prometheus-operator/kube-prometheus/docs/customizations/developing-prometheus-rules-and-grafana-dashboards.md#mixins
      grafana+: {
        // clear all dashboards in the default folder
        dashboards: {},
        folderDashboards+:: NodeExporterMixin.grafanaDashboards + ...,
      }, 
    },
  };

Its specifically Node exporter dashboards that differ. Is there any additional config added for the default config?