Hi XR8,
i have been using RC for about 2 years now, i had a few issues with lost communication.
The issues were resolved by doing the following.
made sure the correct driver for USB was used
installed ferrite cores on both the usb cable and the timing cables.
also noted that running cars that did not have caps on the motor caused the lost communication as well.
Since doing these changes have not had any issues.
Regards
Allan