Anyway, I think the bug affects live weather only. I’m right now transitioning to native afterburners with clear skies to build the flight envelope over f-15 and f-14. To make that I need to set clear skies, 15 degrees ISA and flight over different altitudes to calibrate top speeds. With live weather I see how in the tropopause the weather changes from -56 degrees to 22 degrees, but not in custom weather profiles.