Bugs in content types

When you user multiple choice you can "check the answer" even if no answer is selcted by the user. That makes no sense.

If you choose to check without an answer given nothing happens and only the button "show solution" (if activated) appears. If you then click it it says "Answer required"  (or similar) but you have no chance of giving an answer anymore and you are stuck with the error. There is something wrong with this process.

- You should definitely not be able to "check" an answer that has not been given.

I tried to incorporate different features with the "Column layout" in Moodle. For example the Drag and Drop feauture and the Multiple Choice feature. There I wanted to upload an image. This is really important, especially for the Drag and Drop feature. I have no problems uploading it, but other participants of the Moodle course can not see it. Why is this so and what can I do against it?

Thank you for your help!

I create an interactive video by pasting a link from Youtube. 

When adding a single-choice set task, the correct answers are already highlighted before the viewer clicks on their own choice, so revealing the answer. 

Also, some interactions freeze once finished, rather than playing the 'completed' sound and 'continue' operation.

This seems to be an issue with a recent update as this was not happening yesterday

I'm using a drupal platform on a windows desktop, as well as H5P's own editor