Are you checking between the 12V and one of these legs? It’s typically connected to ground in these types of controllers. Here’s the SOT23 pinoutfor reference if that is the same package.

It will only reboot once unless it is unlocked again https://grapheneos.org/features#auto-reboot

I have one too and it’s been great. They sell replacement parts including the rubber liner if you need one soon: https://www.litter-robot.com/litter-robot-4-globe-liner.html