Calendar does not update automatically

I have configured some CalDAV calendars, normally I only use the Email window and the Agenda sidebar as calendar. The problem is, that the calendar (and the Agenda sidebar) are only updated when switching to the calendar window.

eM Client Version: 7.0.27943.0

this is a default behaviour for non-default calendars, but we are working on a solution for the Agenda.
It should be included in one of the future updates.