as a third-party House tech contractor to offices, during the lapse in appropriations when I was there they held us offsite for about half a day, and then sent us back in.

but there were also entire agencies who ended up having expired passwords thanks to 90 day rolls that largely occurred during the lapse, causing all sorts of chaos.

Appropriations lapses create all sorts of havoc and security strains across the gov. Do not assume that if it's crucial, it stays resourced.