**List of steps to reproduce** (step by step, including full links if applicable):
* Go to content page with vector 2022 that have TOC on Thai Wikipedia. [This page for example](https://th.wikipedia.org/wiki/ฉบับร่าง:เกมปรารถนา).
* Create some <a> element with `href="#"`. eg. `$('#bodyContent').prepend($('<a href="#">test link</a>'))`
* Click on the newly displayed "test link" link appear on top.
**What happens?**: The browser will reload the page and `tableofcontents={0,1}` was appended.
**What should have happened instead?**: Link should not work and go to the target, as some script will add an action (such as 'mw.util.addPortletLink') by define href as `#`.
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.**: With the same test, this appear to be found on euwiki too which may related to {T302046}