Steps to replicate the issue (include links if applicable):

• Log out
• Create a page with wikitext {{Disputed}} (one maintenance tag)
• Log in
• Visit page
• Page curation toolbar -> maintenance tags -> tag it with two random tags such as {{Advert}} and {{All plot}}`

What happens?:

What should have happened instead?:

Software version (skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

• related but not the same: T323883: Adding maintenance tag to page with {{Multiple issues}} should place new tag inside {{Multiple issues}}