Baro setting does not impact altitude hold

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:
Since day one I have the following problem on ALL planes (even 3th party, like pmdg dc6, justflight piper, etc. :
The plane autopilot altitude hold always holds altitude based on baro setting 29.92, and doesn’t take into account other baro settings.

Provide Screenshot(s)/video(s) of the issue encountered:
/
Detail steps to reproduce the issue encountered:
Baro 29.92, altitude hold at 4000ft, plane shows altitude hold at 4000ft on altimeter.
Baro 30.00, altitude hold at 4000ft, plane descends and shows altitude hold at ± 3980ft on altimeter.
PC specs for those who want to assist (if not entered in your profile)

Build Version # when you first started experiencing this issue:
after update 5
Are you on the Steam or Microsoft Store version?
Steam
Did you submit this to Zendesk? If so, what is your ticket #?
Yes: Request #113936