Thread:Extension talk:Widgets/HTML shown as plain text (MW 1.24, Widgets REL1 24 branch)

HTML like works fine, but the type of HTML that isn't allowed in normal wiki pages, e.g., is displayed by Widgets as plain text, just the way it would be if I had put it directly into the wiki page.

I expected it to allow all HTML tags.

What might be the problem? Thanks in advance