I'm not sure if this belongs in Creator or Reports forum:
I have a radio button with a number of options. One of these options had quotes.When a user selected this radio option, the report (as a pie chart) for this selection count got re-titled to the user's name! Once I deleted the quotes, the pie chart displays the title properly. So it seems quotes are messing-up your back-end code.
I made a test app so you can see the strange bug...