On page save error, structures are lost

[DanBrooker]

Steps

1. Create a new page
2. Add a structure (and not a title for example)
3. Save
4. Save fails (title validation), which re-renders 'edit'
5. Structure is missing

Not sure why this happens or how to fix

Here's my structure if that helps.

  theme.structures = [
    {
      name: 'slide',
      structure_parts: [
        { name: 'image', title: 'Image', partable_type: 'Spina::Photo' },
        { name: 'description', title: 'Description', partable_type: 'Spina::Text' }
      ]
    }
  ]

[DanBrooker]

Thanks @Bramjetten