Graceful Exit. failed to put piece. “error”: "protocol: context canceled; context canceled"

[Alexey]

This is what I mean in your other message:

@Alexey

Also, increasing number of concurrent transfers could end with disqualification if your hardware (router to be precise and your network card) are not capable for high number of simultaneous connections.

So, better to return back to default. Obviously your hardware is not capable.