Depends. peers during day might be different. Not enough seeds/peers. Congested networks. Lots of variations.
Even if peer/seed are a bit less it will not remain contant at 50Kbps, it will fulctuate for sure, like on 2mbps connection it can fluctuate between 10-200 kbps, but if it remains constant at 50 kbps and does not cross that , it means our speed is throttled...
Moreover direct downloads are getting higher speed means you do have the speed...