Empty node bug causing exceptions

[phawxby]

A bug exists in the rich text editor which allows for nodes to exist with undefined content.

{
  data: {},
  content: [
    {
      data: {
        uri: 'https://www.xerox.com/digital-printing/latest/IG5DS-09J.PDF'
      },
      content: [
        {
          data: {},
          marks: [],
          value: 'Bezbarwny toner (PDF, 1,2 MB)',
          nodeType: 'text'
        }
      ],
      nodeType: 'hyperlink'
    },
    {
      data: {
        uri: 'https://www.xerox.com/pl-pl/digital-printing/clear-dry-ink'
      },
      content: [ undefined ],
      nodeType: 'hyperlink'
    }
  ],
  nodeType: 'paragraph'
}

The node is completely invisible to the author using the editor. Their first indication of a problem is the node refusing to render due to this condition causing an error inside rich-text-links.
contentful/rich-text#243

This relates to Contentful support ticket: 79759
https://support.contentful.com/hc/en-us/requests/79759

[github-actions]

Marking issue as stale since there was no acitivty for 30 days