The problem here isn't script related, sometimes data from the client is very slow in detecting.
What I can do is slow down every action what has to do with converyor belt, this means it will slow down with EVERY action at the conveyor
and I really don't want to do that ... -_-
tl;dr
To change the code, I'll have to hack osbot, hack the client, then adept the code that has been here for 3 years, then hack osbot again to upload the new client.
Mission impossible ^
I'll take a closer look and see if there is anything I could do about it. It's an annoying issue indeed
Should be fixed in latest client version
Have fun
Khaleesi