Connecting to the daemon from the client halts downloads

[lorsem]

Hello, and sorry for the poorly written title.
I'm running deluge as a daemon on a server hosted on a RaspberryPi running Raspbian. I changed nothing (not a single packet) but starting from this evening, when I connect to the daemon from my laptop, all downloads slow down and stop downloading (download speed = 0) after a few seconds.
On my laptop (a MacBookAir mid 2013), I'm running Deluge 1.3.6. the OS is apple's stock OSX Mavericks 10.9.3
On my server:

• - The os is Linux Raspbian 7, linux kernel 3.10.25+ (that's the output of) uname -r.

• - The daemon:

  Code: Select all

  $ deluged --version
  deluged: 1.3.3
  libtorrent: 0.15.10.0
  

• - I use Ext4 as filesystem (never had problems with that) and I have few plugins enabled, but they never caused problems either

If you need any additional information, just ask!
Any help is appreciated, thanks