I am getting the same issue.
I have a a file size 56mb. Sometime clients download it and the download just stops before its completed. No errors, client try to open the file and its “damaged”.
My website is hosted by GoDaddy.
When downloading, it doesn’t say the total file size so clients aren’t aware the file is not completely downloaded.
I am guessing the download timeout is from GoDaddy but shouldn’t Download Manager manage this better?