Checked your QVF file and found that you haven't used any aggregate function in the expression. And for "Star Wars" multiple values are there in "SearchAdvanceduser_followers_count" column. see the below chart (Both SearchAdvanceduser_name and SearchAdvanceduser_followers_count columns are dimensions)
If you use add an aggregate function then it will be showed in the bar chart as well.
As a best practice you should always use any aggregate function in the chart expressions. Also validate the data if you think the value is incorrect