[Al Skierkiewicz]

Skehtb,
You don't elaborate on what other issues you are seeing so I will make some general statements.
If the robots stops functioning for something like 20-50 seconds, then you are drawing the battery voltage down to the point that the Crio is rebooting.
If the robot stops for ~50 seconds then the power supply to the radio is causing it to reboot.
If the robot just stops for about 3-4 seconds and you are using Jaguars, then you are faulting the Jags (probably to high current). If that is the case, the LED on the Jags will flash red during the 3-4 seconds.
As to what could be the cause, you could have batteries that are not fully charging or if they are old, may not have the capacity to drive the robot any longer. If you rule out the battery, then loose connections to the battery, the PD or the main breaker can also cause these issues. If the robot just stops but you can start driving almost immediately, the Crio has an inhibit function based on the battery connection you make to the analog module in slot 1. If that voltage falls to 5.5 volts, the Crio inhibits all output. Since you are in Israel, can we assume you made it to an event outside of Israel? If so, your drive train may have been damaged during transit and now has high friction due to the damage. Check the drivetrain by lifting the robot and moving the wheels by hand. If you are using a transmission that you can slip into neutral, the wheels should move very easy. Depending on your design, the friction could be caused by misaligned drive shafts, tight chain, bent wheel shafts or contact between drive components and robot chassis. In some case, stretched chain could be causing the drive train to bind or hang up on other parts.