Insert Date command not working

Hi All,

I am using the insert date command across numerous pages in Dreamweaver CS6 but on some page it fails to save correctly.

The correct code looks like this -

<p align="center" class="One">This page last updated on<br><!-- #BeginDate format:Am1 -->November 5, 2018<!-- #EndDate --></p>

But when I clickl save it rewrites it to look like this -

<p align="center" class="One">This page last updated on<b<!-- #BeginDate format:Am1 -->November 5, 2018<!-- #EndDate -->-></p>

I manually amend the code, save again and it becomes this -

<p align="center" class="One">This page last updated on<<!-- #BeginDate format:Am1 -->November 5, 2018<!-- #EndDate -->-></p>

Can anyone advise what is corrupting the Insert Date code in Dreamweaver and how I can fix this please.

Many thanks,

Adrian