Hi @TarasGrinchak
There are two known issues with Quiz Images
1. Canvas seems to have been unpredictable (or at least not obvious) in terms of whether images are stored in the course, question banks, or teacher's personal area, and this is compounded by different impacts when using import, copy to etc.
- This is expected to be fixed by Canvas imminently
2. Firefox browser is unreliable with Quiz Images - we believe that this has been resolved in our own Canvas Beta instance, but we have a local configuration issue that means it has not been resolved in our live environment,
- Our own advice to our students is not to use Firefox for Quizzes.
Hope that helps