Experience of upgrading to 0.31

No, I'm talking about numbers only (no group by). The picture I shared above was the graph of only numbers (without any group by).
Here is the visualization of what I'm trying to describe.
Screenshot%20from%202018-11-13%2012-16-30Screenshot%20from%202018-11-13%2012-14-14

The questions which gives out only a single number aren't working as they used to do.