Can't return to completed tasks

Hi there, I clicked on “overdue task” at the top of my kanban board, and now i can’t see my uncompleted tasks. I can’t check the box to see uncompleted tasks, i can only see completed tasks now on this board.

It says all tasks are selected, but they don’t show up. If I do a master search, I can find one of the tasks that is still on the board uncompleted.

Thanks!
Jillian