haven't had a problem with it myself either... just make sure you pan the DI's 100% left and 100% right before it goes into the amp on stereo mode! Pan the guitars in LeCab.. If you don't do that, the two channels will leak/blend into eachother, and it will get messy when it's distorted .. but I guess this is not the case in this situation to be honest Does this happen when you are playing it live while monitoring on speakers? If that is the case, you have to use a gate before, because there is no internal "feedback protection" in the amp