[drizzle-zod] createSchemaFactory unexpected behavior

import { createInsertSchema, createSchemaFactory } from "drizzle-zod";

export const { createInsertSchema: createInsertSchemaBroken } = createSchemaFactory({
  coerce: true,
});

export const comments = pgTable("comments", {
  postId: integer().notNull(),
  content: text().notNull(),
  userId: text().notNull(),
});

export const commentInsertSchema = createInsertSchema(comments);
export const commentInsertSchemaBroken = createInsertSchemaBroken(comments);


const wrongData = {
  postId: 1,
}

const res1 = commentInsertSchema.safeParse(wrongData);
console.log(res1)
/*
ZodError: [
  {
    "expected": "string",
    "code": "invalid_type",
    "path": [
      "content"
    ],
    "message": "Invalid input: expected string, received undefined"
  },
  {
    "expected": "string",
    "code": "invalid_type",
    "path": [
      "userId"
    ],
    "message": "Invalid input: expected string, received undefined"
  }
]
}
 */


const res2 = commentInsertSchemaBroken.safeParse(wrongData);
console.log(res2)
/*
{
  success: true,
  data: {
    postId: 1,
    content: "undefined",
    userId: "undefined",
  },
}
*/


const trueData = {
  postId: 1,
  content: "This is a comment",
  userId: "user123",
}

const res3 = commentInsertSchema.safeParse(trueData);
console.log(res3)
/*
{
  success: true,
  data: {
    postId: 1,
    content: "This is a comment",
    userId: "user123",
  },
}
*/

const res4 = commentInsertSchemaBroken.safeParse(trueData);
console.log(res4)
/*
{
  success: true,
  data: {
    postId: 1,
    content: "This is a comment",
    userId: "user123",
  },
}
*/