I was thinking about putting that, no that doesn't happen when downloading from a site, also the port is forwarded correctly through utorrent., it is successful when it tests for it.
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It doesn't look like the typical problem with line headroom, so I'd guess something like a Quality of Service system on the router that is dropping torrent traffic when some background app is either phoning home or even just a local network thing like media player. Anything like that on your router?