My VPN is a mullvad exit node via TailScale which isn’t supported by Synology unfortunately. So Jellyfin on the NAS, and arr + qBittorrent on my windows computer. The problem was in having the mid-download folder on the NAS, causing so many small writes to the NAS that it would shut down the connection. I moved the download folder to a spare HDD on my PC and havent had issues with the setup since. From what I’ve gathered though, this is a really inefficient setup