Category noindex checkbox not working

I would like to uncheck noindex on my question categories, because I would like these pages to be index (good for SEO I believe).  If I uncheck while creating a new category the value is not saved.   Then, if I try to edit and I uncheck, I get an error on the “Category icon class” field and is says “Font icon class if image not set”.  It appears to be a bug and unrelated to what I am trying to do.  Thanks!