I’m not able to prove it, but I suspect that a recent update added a pin code to the HSM under apps>dashboard_name>advanced> require a numeric pin for HSM changes.
I quite literally had never gone into this part of my dashboard until today and the only reason I was there was because I was trying to figure out why the heck I suddenly had to provide a pin to arm and disarm my HSM that I’ve been using for months without a pin, and no one else has access to this system but me
I definitely didn’t make this change and short of someone hacking into my hubitat and making my HSM slightly more secure, I don’t have any explanation for this other than a bug.