Incomplete records break community requests

[tmorrell]

Package version (if known): v12

Describe the bug

If a curator is editing a record that has been submitted a community and saves a draft with validation errors, the request view will break.

Steps to Reproduce

1. Create a record and submit it to a community
2. A curator in the community edits the draft by adding an "Additional Description" and not filling out the "Type" field.
3. Curator saves the draft, and a validation error appears which they ignore
4. The request page https://inveniordm.web.cern.ch/communities/testing/requests/4d1e6f8a-171f-4844-b42c-ff5c5e2f83f6 has a 502 error

Expected behavior

Incomplete drafts shouldn't break the request page.

Additional context

I'm fairly certain this is because the request page record tab is trying to render the record preview on page load. Could the render happen when the tab is clicked? Or somehow catch the error and display an error message instead?