Check reason of recent post conversion fail

[iuravic]

Describe the conversion bug
Not sure if this is a bug or a justified fail, but we should check a real life example which failed for Evanston Round Table

Source of the error
Check exact reason why manual conversion works while Converter plugin conversion doesn’t for evanstonroundtable Post ID = 720 (full post_content here)

Expected behavior
It's possible that this is an actual bug, or a very appropriate fail/skip. We should double check and make sure the behavior is expected, or fix the error.