Unable to fetch tasks of another user in paging grid

I have created a task report. In that task report first, my tasks are displaying. I configure the task report to display the other user tasks and saved it.

But when I calling it in the interface it showing tasks that are assigned to me.

Please refer screenshot

In the below image, I  configured for another user  and save the task report

But below image you can see  it displaying another user data which is mine (bollimuntham)

 

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