How to filter task report based on user

Hi Everyone,

I have a task report. Basically i need to get total count of tasks for  a logged in user, but i am not getting the correct count. In my task report , one task has 2 assignees. Report looks like below,

Task Assignee
Task 1 User1;User2
Task 2 User1
Task3 User2

while querying when i apply the filter for "user1" i get only one task but ideally it should have been 2 right?

Please help.

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