Steps to replicate the issue

1. Log in
2. Go to an article
3. Observe right hand "tabs": "Read", "Edit", "View history"

What happens?

The previously text-less button "Watch" (or "Unwatch") has text

What should have happened instead?

The button is icon-only, without text.
Example screenshot from 2023 (https://commons.wikimedia.org/wiki/File:Wektor_2022_-_Przenoszenie_stron.png):

Software version

• Reproduced on English Wikipedia, Commons, English Wiktionary

Other information

• Reproduced both in Firefox 151 and in Chromium 149.
• Seems like an unintentional side-effect of T426008

Workaround

Custom CSS can be added to Special:MyPage/vector-2022.css:

#right-navigation .vector-menu-tabs .mw-list-item.mw-watchlink {
	span:nth-child(2) {
		display: none;
	}
	.vector-icon {
		margin-right: 0;
		padding: 2px;
	}
}