Well, I never parallel download anything to begin with. Anonfiles gives the max speed (for me) when downloading a single file, so I just do one at a time.

Your response didn't really address what I brought up as a possible problem though, the handshakes. I do agree that if there was no https, there probably wouldn't be problems though. No https, no need for the handshakes. (I did not make up this term, to anyone wondering)

Pause and resume usually happened to me when downloading from anonfiles (like I mentioned near the end when downloading), which might have reinitiated handshakes and possibly caused corruption of the archive.

That's just speculation on my part though, and I'd like someone with more expertise in that area to tell me what they think. I don't think it could be fixed on our end.