[AMIBCP] Tuning "MSI PRO B550M-P GEN3" bios is not functional

[Rck]

Hello,
I'm trying to tune my bios with AMIBCP on my new MSI motherboard, but the change I'm performing is not visible once the bios boot.

With my old motherboard "MSI B350M GAMING PRO", I'm able to change the bios setting, and it's working

• Latest bios = https://download.msi.com/bos_exe/mb/7A39v2P3.zip (2022-07-15)
  
• I'm able to open the bios file with amibcp_5.2.0.31
  
• I can edit the > Settings > Advanced > Integrated Peripherals > (0195) HD Audio Controller with values:
  

• Access/Use = [USER]
  Failsafe = [Disabled]
  Optimal = [Disabled]

• I can save the bios, then flash it
  
• It's okay, when I'm going into the bios on first boot, the "HD Audio Controller" setting is correctly set on "Disabled".
  

With my new motherboard "MSI PRO B550M-P GEN3", I can change the same bios setting, but it's not working 

• Latest bios = https://download.msi.com/bos_exe/mb/7D95v12.zip (2022-08-30)
  
• I'm able to open the bios file with amibcp_5.2.0.31
  
• I can edit the > ' ' > Setup > Settings > Advanced > Integrated Peripherals > (0195) HD Audio Controller with values: (see screenshot)
  

• Access/Use = [USER]
  Failsafe = [Disabled]
  Optimal = [Disabled]

• I can save the bios, then flash it
  
• But when I'm going into the bios on first boot, the "HD Audio Controller" is not set to "Disabled"
  

Did someone have one idea why this simple tuning is not working anymore ?
Thanks !