Q:

Review queues aren't being populated

It looks like there's a bug in the review queues, which causes them not be filled. It's most visible in the First Posts review queue on Stack Overflow – (screenshot for <10k); all items younger than 0:00 UTC are review audits, but I have reason to believe queues all across the network have gone silent. E.g. if you look at today's stats for a couple of queues - only two reviews for queues which are normally much more active:

First Posts on Mathematics
First Posts on English Language & Usage

A:

Thanks for reporting this. The scheduler has some minor issues and backed up. Things should be back in working order now. 

