If I change anything in performance mode such as a different amp or add effect, it's saved instantly even if I turn the kemper off and on again. Just a tad annoying sometimes if I want to try something different without finding the original rig.
Same here. Even when jumping to another performance, when I come back the sound is still changed. I was playing around with some sound settings, and I didn't like it, so I wanted to undo it, but there was no undo option and the settings where automatically saved. I lost my original sound that way... really annoying.