I can confirm this, and have added a note to the respective ticket:
http://trac.tiddlywiki.org/ticket/370
> Is there a workaround I could implement?
I'm afraid there doesn't seem to be any simple workaround.
You could try Lyall's ImprovedSlicesPlugin though:
http://remotely-helpful.com/TiddlyWiki/ImprovedSlicesPlugin.html
-- F.