Sending too many serial commands to Arduino ?

Hello,

We are doing a project with the bittle dog, we are running a little script on a Raspberry Pi sending commands through the serial interface and receiving ultrasonic distance with the code on the Github.

We are trying to send serial commands from a Raspberry Pi to Arduino through UART but after a certain number of commands the robots stops moving. We saw that in io.h on line 34 there was a comment about overflow after too many iterations, maybe this is what is causing our issue?

Is there anyway to fix this? 😄