I wanted to say that it didn't appear like a fixed limit on their side, because it took me more than 8 hours and it worked. However I found another page where they also told to use a download manager on the github url (not the resolved amazon url) to be able to use pause/resume.
I am from Germany though, so Amazon EU. However it seems to be a global issue and it only appeared now, maybe github/amazon are already working on a solution right now. Let's just hope that. Technically I wonder though because nearly the whole internet somewhere depends on Amazon