A few things to do with the button to save all changed scores when re-marking:
it doesn't show the progress of the request to save, so you might think it has succeeded immediately. Worse, it doesn't show an error message when the request fails.
We got a "request entity too large" error when saving lots of changes. It should send the changes in batches.
A few things to do with the button to save all changed scores when re-marking: