Hi guys.
I have installed the latest OS 8.7.15. on my head. I have had the very same issue. After pressing a button on the remote the Kemper just froze. No sound input. Nothing works, exactly the same as described above. After switching off and on again everything was back to normal.
This has happened twice and thankfully both times were in rehearsals. I was also in Performance mode.
Also it happened once that my one preset, after changing a bank, had no fx the first time I selected it. After selecting a different slot and going back to the previous slot the fx (Delay And reverb ) were back again.
This is worrisome cause I have a big show coming up in April and I have my doubts now to use my Kemper for it
I have installed OS 8.7.10 for now to see if it resolves the issue.
Any help would be appreciated.