I think this is a firmware issue so if anyone else is having issues we should let Kemper know so that can roll out a quick update.
My issue is that after a while, I get no input or output led. I switched to my tuner and the bubble was gone as well. Meaning it showed the tuner on the front display but there was no bubble so I could tune. Everything else seemed to work fine.
My Kemper is connected to my Mac via usb and I'm running the latest 5.11 firmware and Rig Manager 2.0.
I've tried a full reset including system parameters and even initialized the flash after I made a backup. But it happened again.