Human task workspace Custom sort for all tasks on specific field

Hi All,
We want to sort HIL tasks in workspace with sorting logic on one specific field(Account number). (Workspace version 10.2.1)
We have added one custom task comparator Rule and added it in system preferences against Task comparator. Also checked dynamic rendering option enable by default. And checked that in Human task as well.
Still the sorting in HIL inbox is not happening on account number field.

We referred below KB link but details for task comparator are missing.[10.1]+FIFO+vs+Dynamic+Task+Rendering