How is the sprint burndown supposed to work?

Hi experts,

I created a sprint with tasks. No matter which field I fill, the burndown chart always shows a flat baseline at zero. Max value of the diagram being “1”. I tried with the T-Shirt sizes and the effort fields but to no avail. Any hints?

P.S.: Using latest version with the docker images if that is important. All other stuff (except mailing, see other post) works.


The burndown chart is being generated once a day. So changes are not reflected right away.

Thank you Marcel, very helpful. I adjusted the time-zone on OS level and it seems to be ok now.