Apostrophes shows as "'" in the title and subtitle of the submit screen.
Issue reported here: https://h5p.org/node/554944
Test content: https://h5p.org/node/555008
Fixed in https://github.com/h5p/h5p-questionnaire/pull/15
Same issue in placeholder text of Open Ended Question, fixed in https://github.com/h5p/h5p-open-ended-question/pull/11