There is some new wikitext that can fix this problem, if you're anxious.
Edit $:/core/macros/tag and replace """$tag$""" with <<__tag__>> in the first two macros
Like:
\define tag-pill-inner(tag,icon,colour,fallbackTarget,colourA,colourB,element-tag,element-attributes,actions)
<$vars foregroundColor=<<contrastcolour target:"""$colour$""" fallbackTarget:"""$fallbackTarget$""" colourA:"""$colourA$""" colourB:"""$colourB$""">> backgroundColor="""$colour$""">
<$element-tag$ $element-attributes$ class="tc-tag-label tc-btn-invisible" style=<<tag-pill-styles>>>
$actions$<$transclude tiddler="""$icon$"""/> <$view tiddler=<<__tag__>> field="title" format="text" />
</$element-tag$>
</$vars>
\end
\define tag-pill-body(tag,icon,colour,palette,element-tag,element-attributes,actions)
<$macrocall $name="tag-pill-inner" tag=<<__tag__>> icon="""$icon$""" colour="""$colour$""" fallbackTarget={{$palette$##tag-background}} colourA={{$palette$##foreground}} colourB={{$palette$##background}} element-tag="""$element-tag$""" element-attributes="""$element-attributes$""" actions="""$actions$"""/>
\end
I'm not sure if you need (or should) replace """$tag$""" everywhere that it appears in that tiddler, but changing it in those two locations was enough to fix your example pages.
Well, it fixed their appearance. If you click on them, it still reveals code. To fix that, you need to
go to $:/core/macros/list and make a similar change in list-tagged-draggable to the set widget.
If you try these changes, be sure to make backups. Though, since they're shadow tiddlers, you can always "delete" the tiddler you edited and start over. Assuming it isn't so broke that you can't get in.
I imagine it would be an afternoon's project to track down all the places that could use this transformation.
Have fun,
-- Mark
Good luck!
-- Mark