Insights charts are rendered in the order of their data is retrieved instead of respecting the order from the config

I have the following Insights tab configuration:

bugs:
  title: Bugs Dashboard
  charts:
    - title: Bugs by Priority (pie)
      type: pie
      query:
        issuable_type: issue
        filter_labels:
          - bug
        collection_labels:
          - priority::1
          - priority::2
          - priority::3
          - priority::4
    - title: Bugs by Severity (pie)
      type: pie
      query:
        issuable_type: issue
        filter_labels:
          - bug
        collection_labels:
          - severity::1
          - severity::2
          - severity::3
          - severity::4
    - title: Monthly bugs created
      type: bar
      query:
        issuable_type: issue
        filter_labels:
          - bug
        group_by: month
    - title: Bugs by Priority (bar)
      type: bar
      query:
        issuable_type: issue
        filter_labels:
          - bug
        collection_labels:
          - priority::1
          - priority::2
          - priority::3
          - priority::4
    - title: Bugs by Severity (bar)
      type: bar
      query:
        issuable_type: issue
        filter_labels:
          - bug
        collection_labels:
          - severity::1
          - severity::2
          - severity::3
          - severity::4

but then the charts order is never the same. It seems to depend on when the data are received from the backend:

  1. First load: Screen_Shot_2019-04-18_at_09.07.58
  2. Second load: Screen_Shot_2019-04-18_at_09.08.19

I would expect the pie charts to always be displayed at the top, followed by the bar charts (following the order defined in the YAML).