Thanks for reporting this! That's a gadget and nothing in MediaWiki code, hence removing the MediaWiki tag here.
Also note that gadget issues are not tracked in Phabricator until there is a dedicated project or it's on the to-do list of a team.
This might be better suited on https://www.mediawiki.org/wiki/MediaWiki_talk:Gadget-userfeedback.js up to the maintainer (@srishakatux) to decide...

I'd simply change the condition to

if ( action !== 'view' ||
    namespace.indexOf( supportedNamespaces ) === -1 ||
    mw.config.get( 'wgArticleId' ) === 0 ||
    isTalkPage ) {

but of course I cannot edit https://www.mediawiki.org/wiki/MediaWiki:Gadget-userfeedback.js ... sigh.

Fixed on wikitech using a variation of the fix suggested by @Aklapper in T226296#5275651

Thanks @DannyS712 for reporting this! After testing the changes @bd808 has made to the script, I will request the interface admins to replicate the same on MediaWiki.

Testing complete. @Wargo @Tomybrz Please help replicate the changes on MediaWiki.org.

• Replace the code in https://www.mediawiki.org/wiki/MediaWiki:Gadget-userfeedback.js with https://wikitech.wikimedia.org/wiki/MediaWiki:Gadget-userfeedback.js.
• Replace the code in https://www.mediawiki.org/wiki/MediaWiki:Gadget-userfeedback.css with https://wikitech.wikimedia.org/wiki/MediaWiki:Gadget-userfeedback.css.
• Also, change the line var supportedNamespaces = [ 'Help' ], in the JS file on MediaWiki.org with var supportedNamespaces = [ 'API' ],

Done