A sharing bug on Maker

I found this on the stage today.

How to repeat this bug:
In the editor, share the code,
Choose Embedding, and choose “Editor”.
In Google Site, insert an “Embed” and paste the code.
In the published site, I can see the code properly
Click on the “Edit” button on the top-right corner
The editor should pop up,
Edit is fine.
When clicking on “download”
A window saying “download complete …”
However, no file is downloaded.

This error was repeated on my Mac, my Neverware Cloudready, and all students’ Chromebooks.