Start the VPN and connect to a location. Open qBittorrent. Go to Preferences, and then Advanced tab. Change Network interface to the VPN (usually its name, like “Mullvad”). Restart qBittorrent.

Basically when you bind it, if your vpn ever happens to turn off etc its gonna stop the download/upload

If you’re on qbit, did you bind your vpn to qbit?

Also your vpn might just be bad, what do you use?