First lines of text appear on top(?)

[Natenom]

Prerequisites

• I have searched for duplicate or closed issues
• I have searched for relatived questions
• I have read documentations

Describe the issue

If there is no more tag within a blog post, the first lines appear twice.

Steps to reproduce

Here a screenshot:

When I add the more tag OR checkout 13a9124 of your theme, it works again:

Expected behavior

Not to double the first lines.

What operating system(s) are you seeing the problem on?

Linux

What browser(s) are you seeing the problem on?

Chrome, Firefox

What version of theme are you using?

7b40de4 (HEAD -> master, origin/master, origin/HEAD) feat(rss): add custom RSS template (#697)

What version of Hugo are you using?

hugo v0.102.3+extended linux/amd64 BuildDate=2022-09-01T15:30:07Z VendorInfo=debian:0.102.3-1

What version of Node.js are you using?

v18.7.0

What version of Git are you using?

git version 2.35.1

Additional context

This is the blogs source code if you want to test:

---
title: Testing Theme
slug: testing-theme
date: 2022-09-06T00:51:23+02:00
draft: false
author: Natenom
#description:
categories:
  -
tags:
  -
---

## This is a Test
La1 la1 plum1 foo1 bar1 bla1.

La2 la2 plum2 foo2 bar2 bla2.

Without a more tag.

## Another h2
This is h2 content.

[razonyang]

Should be fixed by #702, btw, non-manual summaries(without <!--more-->) doesn't work with post.readMoreFromContent.