How to avoid downloading numbered "r" files?

Hey everyone,

I’ve been having an issue for a few weeks now where qBittorrent keeps downloading strange files. These files usually have increasing numbers starting from 1, and many separate parts named r1, r2, r3, r4, and so on.

My questions:

1. What exactly are these files? I’ve never seen this format before.
2. How can I prevent them from downloading? I already added .*r to my qBit exclude list, but they still show up.

Has anyone else experienced this and found a solution?

Thanks!