MJ,
In your OVZ9 settings, deactivate field "Check without RLT" (make this field blank).
And then test again.
I think by changing the above configuration step, the issue shall be solved.
Please paste the screenshots of the test.
Added - To get more clarity in testing, in the material master record in Tab MRP3, field "Tot. repl lead time" give 2 (or some non-zero value).
And then do the entire flow (starting with checking CO09, sales order creation etc.)
Message was edited by: T W - added in blue color