autoaccounting via AP Invoice based on Project setup

Currently we have setup for autoaccounting for one of the GL segments based on Project's Organization - and it is working as intended.

But we want to have flexibility to generate the GL code based on Task Level Organization.

On the AutoAccounting rule assignment, I have set the function: Supplier Invoice Cost Account to based on 1 rule i.e. with Source = Parameter and Value = Task Organization. I have the relevant values in the AutoAccounting Value set.

But when I create a new AP Invoice with relevant task - accounting is still generated based on Project Organization.

Please advise if there is any missing steps.