Custom search block that searches only one content type uses "type" filter instead of "bundle"

I created a search block that was configured to search only one content type. I disabled all other content types from the results too. The block was displayed on a Views page listing that content type. When I did a search, the results page listed content from all node types and the URL was http://mysite.com/search/apachesolr_search/cloud?filters=type:video (cloud was the search term). If I change type:video to bundle:video, the expected results are shown.