Identified the problem.

The issue is plain text is eating the line break so paragraph is failing since it expects a line break at the end.

src/parser/object.rs

@@ -39,6 +39,7 @@ impl<'s> Source<'s> for Object<'s> {
     }
 }
 
+#[tracing::instrument(ret, level = "debug")]
 pub fn standard_set_object<'r, 's>(
     context: Context<'r, 's>,
     input: &'s str,