If post's description section is empty search does not find this post.

[sysroad]

for example.
A post has a head part like below

title: grpc sample code
date: 2021-11-11T13:22:00+09:00
description:
author: frog
tags:

• grpc
  draft: false

---

Typing 'grpc' to search box not work. doesn't find this post.
But fill the description to 'aaaa' or 'bbbb' or etc then search works.
Is this the intended behavior?