TypeError: Cannot set property 'block' of undefined

[sentry-io]

Sentry Issue: WORDPRESS-IOS-48D8

TypeError: Cannot set property 'block' of undefined
  at o (gutenberg/packages/blocks/src/api/raw-handling/special-comment-converter.js:110:15)
  at t (gutenberg/packages/blocks/src/api/raw-handling/special-comment-converter.js:67:20)
  at anonymous (gutenberg/packages/blocks/src/api/raw-handling/special-comment-converter.js:32:3)
  at anonymous (gutenberg/packages/blocks/src/api/raw-handling/utils.js:144:4)
  at anonymous (gutenberg/packages/blocks/src/api/raw-handling/utils.js:138:11)
...
(38 additional frame(s) were not displayed)

[fluiddot]

Probably related to WordPress/gutenberg#55652.