I just got my Xcontroller connected, ran through the setup including Z probe, and with the probe connected and am having the reverse behavior in Easel than expected (always shows contact when no contact is physically there, physical contact shows no contact).
I tested the connections with a handheld DMM and it worked as expected (closed circuit when touching, open when not touching). One thing that seemed strange was that, when using the carriage socket, when nothing is connected, the input shows closed as if there was contact. That seems…odd.
I submitted the info inside of Easel.