I’ve had my X1Cs, a P1S and an A1 Mini in LAN only mode for a few weeks… and I blocked all their access at the router. But as I’m reading your post I realized what I didn’t block was the access of Studio on the computer I run it on. Is it possible if you have that option to “auto sync user presets” turned on it’s trying to connect constantly?
I know it’s not best programming practice to have something that never times out but maybe that’s the case?