Hi, I have now tried on official release 7.4 and 7.5 beta, and it doesn't matter, as soon as I turn the knob on my Kemper to PEFORM, it crashes.
I have also noticed that every time I connect via USB to Rig Manager on my PC, it re-syncs ALL 125 performances and takes 2 minutes before I can do anything. This definitely didn't happen in the past.