Metabase 0.31: Multi series charting doesn't work with number visualisations

[AndrewMBaines]

It was spotted in this thread:

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%2012-16-30][Screenshot%20from%202018-11-13%2012-14-14] The questions which gives out only a single number aren't working as they used to do.