As of 12/26/19, the Operator field is again missing when a new parameter file is created. I manually added it to my file, but RSAT doesn't recognize it. I had a GT sign in it, but here's what I got:

Comparison Failed:
Expected PO000626
Actual: PO000626-1
Operator: =

Status: Test case failed.

Steps:
Navigate to: PurchTable (purchtablelistpage)
Use the Quick Filter to find records. For example, filter on the Purchase order field with a value of 'PO000619'.
In the list, mark the selected row.
Note the value in the Purchase order field to reference later (Value saved in this run = "PO000626")
On the Action Pane, click General.
Click Postings.
Validate that the value for Confirmation is 'PO000619-1'. (Value used in this run = "PO000626")

ERROR:


DEBUG INFO:


MS.Dynamics.TestTools.TestLogging.EvaluateException
Comparison Failed:
Expected: PO000626
Actual: PO000626-1
Operator: =
at MS.Dynamics.Performance.Application.TaskRecorder.Review_purchase_order_postings___Confirmed_POBase.<.ctor>b__e(Object s, CompareFailedEventArgs ev)
at MS.Dynamics.TestTools.Evaluating.Evaluate.LogFailure(Object actual, Object expected, String message)
at MS.Dynamics.TestTools.Evaluating.Evaluate.Compare(String actualResult, String expectedResult, String message, StringComparison comparisonMethod)
at MS.Dynamics.Performance.Application.TaskRecorder.Review_purchase_order_postings___Confirmed_POBase.CompareString(String actualValue, String expectedValue, String comparisonOperator)
at MS.Dynamics.Performance.Application.TaskRecorder.Review_purchase_order_postings___Confirmed_POBase.Review_purchase_order_postings___Confirmed_PO()