yes, it looks this, where T is switching the start position. if you replace that ‘g’ with a ‘z’ it will evidence this problem. it seems like it could be solved with some boundary protection at minimum.
i do plan to update and concede it might be a version problem, but i thought that if the OP was not getting it to work at all, maybe my older version, working as it is, might be educational as to when this problem showed up. i remember it behaving this way or a little worse in the previous version, possibly locking up all sound until restarted.