Archiving tasks with due dates causes issues in Outlook
I noticed an issue that I wanted to bring to your attention.
When you create a project that has due date and labels and then archive that project, it will cause tasks that are undefined to show up in the Filter section that calls those tasks in the Outlook app.
For example, I created a new project today that I wanted to use as template for future projects. 3 of the tasks in that project had due dates (to be done every weekday). All the tasks in that project has the label @work. After exporting the tasks in that project as a template, I proceeded to archive it.
I have a filter which looks for tasks that have the @work label and is overdue or due today called Work Focus. When I look at this filter on the web, it shows all the tasks as expected. However, when I look at this same filter in Outlook, it shows the 3 tasks that had been archived. I could not determine which projects they belonged to because the right column that shows the project name shows as Undefined.
Hope this provides enough information to help you resolve it. Let me know if you need any other information.