FMS: OPT FL calculation incorrect

[BravoMike99]

Aircraft Version

Development

Build info

{
    "built": "2024-03-16T11:45:16+00:00",
    "ref": "refs/heads/master",
    "sha": "6341eaef60d955dd2259009da60f80cfff653ade",
    "actor": "2hwk",
    "event_name": "manual",
    "pretty_release_name": "master:6341eaef",
    "version": "a32nx-v0.12.0-dev.6341eae"
}

Describe the bug

The optimum flight level calculated by the FMS does not take into account a minimum of 5 minutes of cruise flight. As visible on the following pictures, a 135nm flight had an optimum cruise level of 395 but, by inserting FL390 cruise flight (second picture) the airplane will never reach cruise altitude before the calculated T/D.

Expected behavior

Optimum flight level requires at least 5 minutes of cruise flight.

Steps to reproduce

Insert a short distance flight into the fms, fill in second INIT page and observe the optmum flight level in the progress page.

References (optional)

DSC-22_20-50-10-25

Additional info (optional)

No response

Discord Username (optional)

bruno_pt99