You may have noticed that an end user may accidentally select a different question from the optional questions’ drop down list, without being warned that the answer has not changed.
This is by design, currently the product does not offer such warning mechanism. An enhancement request (TF00775744) has been created detailing the feature above.
The product team will evaluate the request and this feature may become available on a future release of the product.
Please refer to this article for updates or contact support referencing the Enhancement Request ID: TF00775744.