Screen corruption with telnet, ssh
 

I have a shell script which invokes multiple processes and each of the processes write output to the terminal by using terminal functions like "tput cup x y" and "echo "xxx".
I have ensured that there is no race condition when the processes simultaenously write to the terminal by implementing a lock mechanism.
This works perfectly when I run the script from my linux machine console.

However, when I use telnet/ssh to connect to the machine and then invoke the script, I find that though there is no screen corruption most of the times, sometimes there is corruption.

What could be the reason?

Thanks and Regards,
Subu