R bookdown中的交叉引用会使地物名称不正确



我正在Rmarkdown中生成绘图图,并为它们提供名称和标题。但当我在文件中交叉引用它们时,它们的名字就毁了。

这是代码:

---
title: "Preliminary Statistics"
author: "Babak"
date: "6/28/2021"
output: 
bookdown::html_document2:
fig_caption: true

---
```{r setup, include=FALSE}
knitr::opts_chunk$set(
echo = FALSE,
fig.width=9, 
fig.height=5 ,
message=FALSE, 
warning=FALSE)
```
```{r Area_duplicate, fig.cap = "Area of duplicated and unique properties by municipality"}
<PLOT CODES>
```
Plot @ref(fig:Area_duplicate) shows the area od duplicated properties in the dataset grouped by municipality.

结果:

标题的屏幕截图

我应该怎么做才能解决这个问题?

将名称中的下划线替换为&quot-&";。

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