I just experienced the bug during my first few minutes exploring the module… If it helps (though it looks like you found the root):
I had a cable patched from the first output to a buffered multiplier, and the first input patched with an envelope from MATHS module. Spend about 30 seconds diving menus – and got the selfsame dialog box…
So if I plugged an ethernet adapter into the ethernet supporting USB port, could I ssh into the percussa to force it to reboot? (this use case is a novelty at the moment, but curious what’s possible and how much is exposed to the shell) )
Looking forward to the update, if you need beta testers, consider my hand raised.