Storyline Quiz settings problem

Hi Phil,
Thanks for your help.

In this project there are 3 different scenes.
Each scene has a different results slide.
But in the last scene 03 there is an additional results slide which adds the total results of scene 1 + scene 2 + scene 3.

When I check the Quiz settings before exporting the project, I discover that some slides are unchecked randomly in certain scenes. So I have to check the quiz settings of all the scenes and check all the missing slides again. The export is done correctly but what I do not explain is the random nature of this uncheck.

If the unchecked slides are slides that have just been edited, the security logic seems relevant to me.
On the other hand, it happens to me that unmodified slides in unmodified scenes end up unchecked when I do the check in the quiz settings.
See screenshot attached.