I'd delay any effort to replace and investigate the possibility that some switch, some wiring has stopped working. Of course, make sure that you reset the 12Volts to reboot the system if you haven't done that aready, and move the keypad panel to the bath and plug directly into the multiplex panel to ensure that this is not just a glitch. I had troubles with all my passenger side LEDS which was created by Middlebury techs repairing my massive water leaks and they miswired some wiring up on the roof at one of the downpipes which containjh most of that roof wiring.
Again, a call to the people in Middlebury would be in order, I think.
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5FI