Discrepancy between created Task from the Lead form and ToDo form

When selecting a user from the “Assigned To” field in the Task modal form from a Lead, it does not automatically populate the “Allocated To” field in ToDo but selecting a user from the “Allocated To” field in ToDo will show in the “Assigned To” field in the Task from a Lead.

For now, we have to create the Task from the Lead and then go to the ToDo to allocate the user and only then will it show in the Task from the Lead.