I am using a powered toaster running into a Kabinet. One thing I've noticed is that right after the Kemper boots up, tones are extra noisy for the first couple of minutes, then things settle down and the additional noise goes away. The difference could be comparable to the type of noise difference between a single coil vs. a humbucker. It responds to the noise gate and master volume just like any normal tone would.
Once this noise goes away, I can immediately reboot the Kemper doesn't come back the second time around. It almost feels like some residual charge that needs to dissipate if that makes any sense.
It's not a big deal since it's so short lived, but wondering if others have experienced the same issue.