This seems to be due to some fault in the dB reporting and can be worked around by creating a configuration file that overrides this property.

File can be placed in either /etc/wireplumber/main.lua.d or ~/.config/wireplumber/main.lua.d

To find the device name either use wpctl status look for the device id and use wpctl inspect <id>
Another, and quicker, way is to check output from pw-cli ls Device

/etc/wireplumber/main.lua.d/51-Bowers_Wilkins-MM-1.lua

rule = {
  matches = {
    {
      { "device.name", "equals", "alsa_card.usb-Bowers___Wilkins_MM-1_304-00" },
    },
  },
  apply_properties = {
    ["api.alsa.ignore-dB"] = true,
  },
}
 
table.insert(alsa_monitor.rules, rule)