That is correct. We have multiple quizzes on our site and the issue affects all of them.
One quiz in question is located here: https://mcfieinsurance.com/mec-insurance/
And the image URL is: https://mcfieinsurance.com/wp-content/uploads/2022/10/6qs-mec.jpg
But this image is not actually linked to the quiz anymore because in trying to solve the issue of the image not displaying we removed and tried to re-add it to the quiz on the backend. The image will no longer save to the quiz on the backend. We can select the image, but upon clicking save it disappears.
Here is an example of a quiz where the image is still linked and not appearing on the front end. https://mcfieinsurance.com/guaranteed-vs-variable-life-insurance/
We have not edited this image since the issue started. https://mcfieinsurance.com/wp-content/uploads/2022/10/5qs-wl-thumbnail-sml.jpg
It is likely the Advanced Custom Field plugin was updated when the issue started, but we did not specifically notice when the issue started.