When I make an rmd to create a word file, the table of contents does not automatically populate. I have to go into the word file and click ‘Update Table’, refreshing the table of contents, under the Table of contents header. I dont know why I have to do this, but this is for a mass produced document so I need it to appear automatically without any input. Here is an example from the default rmd, which gives me this problem.

---
title: "ex"
author: "Example"
date: "`r Sys.Date()`"
output: 
  word_document:
    toc: true
---

## R Markdown

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. 

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