We recently updated to PCS 9.1r11.0 and after that we see that when we use the terminal services client for connecting to a windows hosts thru rdp the connection breaks when we copy a file from the local host to the terminal one.
If we connect with pulse secure client instead and use windows rdp client it works, so it has something to do with the terminal services client.
I cant get a hold of an older version of the terminal services client to try with unfortunately.
No, I can't see that the firewall is dropping it.
I know the thread is a bit old but we still have this problem.