Ao3 rss feeds don't have their tags translated into filterable tags in newsblur

I subscribe to several rss feeds from Archive of Our Own (AO3). Works on AO3 have a variety of tags, but in the versions that come through to Newsblur via these feeds, the tags are put into the body of each story instead of being parsed as tags. I’d love to be able to filter the feeds based on the tags, so having newsblur properly read them as tags would be very helpful.