Umbrel home disconnecting

I bought the Umbrel Home, because my old raspery fi, had an accident with water …

Everything is fine, I already have the bitcoin node 100%, except when I come back the next day to my office every day the node is disconnected …

I try to use Ip angry to find it, but I can not. This is the third time this happens to me. When I restart with the button (10seconds) and the node is restored, all is going well…

I don’t know if I have to make a “static ip”.
I have mac, I don’t know what I have to do.

Please help.

I already restarted the node, and I could find it in the angry ip scanner.

and everything is ok… then I think the problem is that the node shuts down automatically.