I have run into this problem several times and have never figured out a solution. In a preset with the Reverb block that has Channel A set to a Cathedral Reverb with like a ten second Time setting, and the Reverb block Channel B with say a Spring Reverb with a short (say a couple seconds) Time parameter. If I am playing on Scene A and switch to Scene B, and play for a while (even a few minutes) and then switch back to Scene A (with Reverb on Channel A) it seems to instantaneously pick the Reverb tails back up from when I was playing it earlier. So if I switch to the Scene with the long reverb during a quiet moment, there is a big burst of reverb trails that appear to be what was leftover from when I was using that Channel earlier. Has anyone run into this and solved it? BTW, I have tried it with Spillover off and on with the same results.