Duplicate Tasks on Deadline Date

There is an issue where tasks are being duplicated in the UI when their scheduled date matches their deadline date. Specifically, if a task is set to be done on the exact same day it is due, it appears twice in the task list/calendar view instead of just once.

Steps to Reproduce:

1. Create a new task.

2. Set the task date to today.

3. Set the deadline date to today as well.

4. Save and view the task list/calendar.

Expected Result:

The task should appear only once.

Actual Result:

The task is displayed twice.