The title pretty much sums it up. Even though I set the showLine property to true in the ChartConfiguration the dots are not connected with a line in the chart.
I tried with the following versions:
StackBlitz: https://stackblitz.com/edit/github-gus4a9-97hc3u
It seems to work with the original chart.js library.
Am I missing something?
As kikon pointed out in this comment, there was never actually a problem, just a styling issue.