Just sharing my issue and status in a separate thread: I currently control my Kemper stage via a (homebrew) MIDI pedalboard. I send bank select/program change commands to select performance and slot, plus control change commands for wah-wah pedal.
In this setting, the Stage freezes regularly, showing only a big "Kemper Profiler" in the center of the display and not reacting to any input (direct or MIDI) - I need to turn it off and on again to make it respond. This is independent of whether the Stage is connected to my PC via USB or not.
I've reported this to Kemper support - apparently they are aware of this issue and the OS team is working on a fix. Hope this comes soon; can't use the Stage in a live scenario like this.
Just wanted to share this in case anyone else is having the same problems.