🚀 go-pugleaf

I keep getting (particularly on NNTP sockets) the transfer stopping and
when I do a socket <n> to look at it I see something like:

net> so 136
TCP 852a0008 ascii eol seq: 0d 0a
Local: 193.197.64.61:1053 Remote: 194.159.247.38:119 State: Established
      Init seq    Unack     Next Resent CWind Thrsh  Wind  MSS Queue
Total
Send: 1adf5000 1adf6c34 1adf6c98   4016   536   536 17276  536   100
7219
Recv: 55901b97          5592489c  12970             11680          0
142596
Reassembly queue:
  seq x55924a9c 512 bytes
  seq x55924c9c 512 bytes
  seq x55924e9c 83 bytes
  seq x55924eef 512 bytes
Backoff 1 Timer running (27720/28710 ms) SRTT 2614 ms Mean dev 2926 ms

What is this?  In some cases it runs to 10 or 15 lines in the queue.  I
thought at first it was something to do with the packet sizes, but they are
all 576/536 as standard.  (the 83 bytes in that example is unusual, usually
they are all 512 bytes).

Is this something wrong with my configuration, or is it normal?

Chris C