Ah, dang, I haven’t run into this yet. But I see what you mean. I actually just set this up in Linux, but back in Windows I didn’t run into this problem (maybe I was lucky enough to hit the same port, or maybe I didn’t have it set up entirely correctly, lol).

Yes, this is what I do, with Private Internet Access (VPN). You can bind qbittorrent to PIA’s interface, and also to its forwarding port.