[Libreoffice] UNO make me crazy

I'm always with my Delphi URP client

I've made this test

1) start soffice on local host on port 8001
2) start an office proxy of mine on port 8000 that redirect everything 
to port 8001 and record everything to disk
3) start a python script to load a file and convert it to PDF
4) start my Delphi client to do the same

This is the log diff from WinMerge
http://www.execute-info.com/RemoteOffice.htm

Except for object IDs and Thread IDs, I can't see any difference between 
the two logs except that office stop responding after my last 
readbytes() reply !

BTW we can see in this sample that XInputStream is used to read many 
times the same data from the remote file, probably a loop on each import 
filter, they should use a local cache for that !

someone has an idea?

Regards
Paul