

It’s more of an issue with torrent seeding. You need to be able to accept incoming connections to seed, so you need a VPN/router to allow incoming traffic to a certain port to reach your torrent client.
So, not a problem for leeching, but if you are trying to meet ratio requirements, could be a big problem.
It would allow SSH if the desktop is locked, they’re separate. If you can get in via SSH then you can poke around logs like dmesg and see what’s up. There will probably be some messages to give you something more specific to search with.