Fortunately, the wagers aren't lost anywhere, just that thing needs to get started back up for processing to resume.
Absolutely correct. We have alarms in place but I've stopped just short of having them actually wake me up. We have made some great improvements in the resilience of the processing but there are still occasionally issues. I hope to get them ironed out in the next few weeks.
Regardless, at the very bottom of the main page there is a status indicator now. It shows the time in GMT of the last metrics reporting run and how many seconds ago that was. It should in general be between 0 and 120 seconds or so. If it goes longer, it means the processing is very busy or stalled in some way. If there is a problem, all transactions will be handled when it starts up again.