Character style issue in IOS

I am using a paragraph style (named Narrator) in my story. When I need to use italics I then add the character style emphasis. My problem is that after adding the character style to a word and I then want to continue writing with non-italicized words, I cannot change the style to toggle off the emphasis format. I can work around this by typing the entire sentence or paragraph and then going back and highlighting the word that needs to be italicized and tagging it adding the emphasis style, but it seems like there should be a more straightforward way. Bug?
Attached is a screenshot.