My Todoist has sync to a Google calendar.

Sunsama handles events which are added by Todoist to the calendar as normal calendar events.

It isn't able to match the calendar event to the specific Todoist task. So the task behaves as it wouldn't been added to the calendar already and when clicking the calendar event, it doesn't have links to Todoist.

Moreover, it would be helpful, if the task would appear automatically into "Tasks" section, if a date has already been assigned to it in Todoist.