Automatic E-mail reports - time span is ignored

I think we found a mistake that’s been around for years.

When a report is automatically sent by e-mail via the planning function, the report displays the “Visit Summary” diagram for the entire period, starting with the time we installed Matomo/ piwik. In this case it is several years.

For example, we only want to have the last month (and only this month) in the report. How do you do that?