Safe Zone turns off by itself, have power and zone chips.
I have had an issue whit that our Safe zone turnes off, we got a total of 200+ zone chips + 6 large reactors whit power.
It seem random but we have yet to see the exact moment when the sheild fail ( we keep the sheild low viabul becase of that i'm easily nausiated, but we ahve not set it to be easier to see.
Setup is: Safe zone block ->Small cargo-> Rest of base.
This have happend both whit Zone chips in the Block and in the cargo container and it have happend twise in a 6 hours period and a total of 4 times that we remember, but only while we have been on the server.