@Zanna I also noticed that. Do you think that a more coordinated review spree would help? Make a meta call for reviewers, for example, to mainly focus on a problematic queue, e.g. Close votes, for a couple of days, so we can clear that up?
@Zanna That's what I try to do the last few days, but it doesn't really work for the Close votes queue, since 5 votes are quite a lot. What Karel was doing previously, bringing questions that needed to be closed here, was highly efficient, since we could close them out of the queue, bypassing the 20 reviews limit. Right now that only a few people are here (well, mostly me, you and recently Shree) this doesn't work however, and most of the few questions that I have brought are still open.
The same goes for the Low quality posts queue.
For the Suggested Edits queue, things are much easier, since it only needs 2 votes for a post to get out of the queue. Many times even a single vote is enough, by improving the post.
The First posts queue also needs attention. In my opinion it's the hardest of all queues (I hate it), because there many things that a reviewer must focus to.
