[Cessna Citation Longitude] Wrong overspeed alert

[Airking26]

Do you have any add-ons in your Community folder? If yes, please remove and retest before posting.
no.

Are you using Developer Mode or made changes in it?
no.

Brief description of the issue:
After latest update there seems to be a mismatch between overspeed indicator and accoustic warning. The overspeed indicator starts at 312 KIAS on FL340 while accoustic warning kicks in at 290 KIAS.

Provide Screenshot(s)/video(s) of the issue encountered:

Steam edition + modern flight model + no addons / plugins / third-party libraries in use

[TwoSuitz]

After FL280 you should be using Mach not IAS for speed settings.

[Airking26]

Does not answer my issue. Always used KIAS (which might technically not be ideal) and this never happened prior to the last update