I couldn’t get a heresy game so I just started one my self.
Waited about 10 minutes alt tabbed wait for joiners.
Got one and started and 2 minutes later got another.
Shortly after we all died.
Can’t restart the mission with my team so I go to find another and can’t so I wait 10 more minutes till I get people joining my game again.
While personally I wish you could restart from the security checkpoint rooms, I get why they don’t and some people wouldn’t want that, but this would be a great compromise.