Improvement 1:
Add also the Closed tasks. It would be helpful for having an overview and tracking inside Self

Improvement 2:
Add a new column Status. Tasks will have 2 statuses - Active or Closed
Add a filter by status - Multiselect with 2 options (Active and Closed)
Do not set ordering ascending/descending on this column

Improvement 3:
Add a new column Invoice Number - It would be helpful for having an overview and tracking inside Self
For closed tasks, add the Invoice Number. For active ones display “-” or "N/A"

Improvement 4:
Change from “Issue” to “Issue ID”

Improvement 5:
Add space before min