Original reporter: @Umherirrender (bug 57109)
When looking at https://meta.wikimedia.org/wiki/Special:CentralNoticeBanners with a Internet Explorer the fieldset has labels like:
<-header>
<-banner-search>
<-banner-bulk-manage>
<-one-off>
<-addBanner>
<-banner-list>
Looks like the prefix in the messages is missing.