The combat/navigation code in the templates is very basic, and very old, dated from about 2 years now. It has been kept for showing people bots that run around, but the point of these templates is to help programmers design their OWN bot : I expect a bot coder to REDO this combat/navigation code. Remember, the RACC templates are NO working bot. The real bot code is on my hard drive
The bug you are experiencing comes that the bots evaluate each frame if they should pause or not. But since 2 years ago computers weren't as fast as they are now, these bots decide to pause much more often on nowadays computers (since they think about it more often). At the extreme you can have 10 bots paused and 2 running at the same time.
But as I said the AI code in the template is completely outdated and without real interest. The interesting things in the template are the sensing and motile parts of the AI, not the core AI itself. You have to write it yourself.