[Bug]: Problem with notification

Bug Summary

No Notification is send if a task assigns to own user and a subtask is created with a different assignee

Description

If i create a new task with User A (thats the user logged into kanboard) and add this User A to this taks and in this task we create a sub task with an assignee User B, there is no notificatoion send about this sub task to the assignee B. User A and B has notification (mail) enabled and receives notifications for tasks created by him and tasks assigned to him.

In the same task the User B creates a Sub task and assign this to User A -> a notification is send.

If User A add User B as assignee to the Task the User B gets a notificatoin about that event. And now the User B gets also a notification if User A add a sub task with assignee User B.

Steps to Reproduce

Create a Task Assign yourself (the user which is logged into kanboard at the moment) to the task Create a sub task and assign it to a different User

No Mail is send to the user which is assigned to the sub task

Expected Behavior

notification is send to the user that is assigned to the sub task

Actual Behavior

No Mail is send to the user which is assigned to the sub task

Version

1.2.52

Database

MariaDB10.11.14

PHP Version

8.3.6

Browser

Chrome

Operating System

ubuntu 24.04

Relevant Logs or Error Output

Additional Context

No response

Checklist

• I have searched existing issues to ensure this bug hasn't been reported before.
• I verified that the problem is not caused by a plugin. Please report the issue to the plugin author if applicable.