A field_type with no honest home in FormFieldType — today, tables and anything new.
A choice group whose box count and option count disagree, so no index join is trustworthy.
A choice group whose boxes and options agreed but whose per-option descriptions did not.
A property that named no geometry, whatever its type. Kept apart from unsupported-type: a
vendor data problem filed under the column we read for schema gaps sends readers after the
wrong bug.
Why a detected property could not be offered to the editor. All are about the vendor's output.