It is quite possible the CC as kick mentioned earlier, especially if its only occurring during BGbot since that would be using your CC functions quite often. I get it sometimes when im raiding with my holy pally, Its almost like the CC is doing soooo much pretty quickly that it bugs wow out, just speaking from personal experience though. Try singular out while BGbotting see if its still doing it. Another thing it maybe is your router/isp getting packet losses, My web can sometimes do that if it gets flooded with lots of requests it'll pause/packet loss and i'll lag out for a few seconds or simply DC