Software should be silent on success, loud on failure

I experienced the following:
when grading, I upload feedback files. these uploads take a while
I use the time filling in the actual grading number
then I say save and I thought it used to wait until uploads are done
last time though, most of the uploaded files went missing

why that was unexpected:
saving is not disabled while an upload is in progress
this is fine if – as I thought it used to be – it waits for the upload
to finish and the file is actually saved
if it doesn’t and saving is not disabled, it should at least
give an error message telling the user their upload was cancelled

I just experienced this once; I’ll try next time and report if this behaviour shows again

reproduce:
• start grading
• upload feedback file (by dnd) that takes a while (eg due to file size/connection speed/…)
• save before the upload finishes (I usually say save and advance but I doubt it matters)
• review the grading table: the upload doesn’t show and student doesn’t see it either