Apostrophe problem in SHORTANSWER question embedded inside CLOZE question

There is an apostrophe problem in the display of a SHORTANSWER question embedded inside CLOZE question, e.g.

Rewrite "the book of John" using a genitive

When student enters "John's book", the displayed output is "John\'s book", with an added unwanted backslash. And each subsequent click on the Submit page button adds more backslashes: "John
's book", "John\\\'s book", "John\\\\'s book", etc.

Joseph