Converting from Singlestat to Stat - no more graphs/sparklines

Since Grafana 7.1.5 asked me nicely, I tried to covert a few of my Singlestat to Stat with no luck.

I can’t get it to show the graphs (sparklines) at the bottom while they work fine on Singlestat (I am aware Stat won’t show if the panel is small, so I made them big with no luck either).

Any idea what I might be doing wrong?

Here an example, which works fine on Singestat but not on Stat:

Here is what I get from Influx: