My inclination would be to suspect EMI. It’s not usually a problem w/ Nomads, but when the system loses the connection it doesn’t want to talk anymore is my understanding.
We’ve got a section on the wiki: Shapeoko CNC Router, Rigid, Accurate, Reliable, and Affordable —
Please see:
https://carbide3d.com/blog/dust-collection-disconnects/
review them and see what you feel applies to your situation which you are comfortable trying — if that doesn’t help, contact support@carbide3d.com, let us know what you’ve tried and we’ll look into it.