Adding many files at once is broken
When student wants to add work in Assignment and uploads files, the dialog window breaks if certain number of files is added at once (depending on the screen resolution).
The problem is that button for confirmation gets pushed behind the border of dialog and scrolling is disabled. You can only reach it using Tab key, but that is not an option on phones and tablets meaning it's impossible to confirm the upload.
Users have to upload limited number of files at once (on iPad it's only 2 at once). The problem can be seen in attached screenshot from my PC with FullHD resolution.
This bug was reported to the support and I was told to also post it here to increase visibility and let others know.