Detect BitLocker status WITHOUT admin from a service

After following this post I was able to detect bitlocker without admin permissions, debugging in Visual Studio works fine and running my program standalone is also fine. However, my program runs as a service normally and when ran as a service it always results in 0 as the bitlocker status.

Here is the code snippet of what actually gets the BitLocker state.

public static int? GetDriveBitlocker(DriveInfo retdrive)
    {
        IShellProperty prop = ShellObject.FromParsingName(retdrive.Name.Replace(@"\", "")).Properties.GetProperty("System.Volume.BitLockerProtection");
        int? bitLocker = (prop as ShellProperty<int?>).Value;
        return bitLocker;
    }

No errors are thrown, it just results in 0 (unknown) whereas ran from VS it would be 1 (Encrypted).

A PowerShell equivalent of this is

(New-Object -ComObject Shell.Application).NameSpace('C:').Self.ExtendedProperty('System.Volume.BitLockerProtection')

So to easily reproduce i created the following script

$var = (New-Object -ComObject Shell.Application).NameSpace('C:').Self.ExtendedProperty('System.Volume.BitLockerProtection')

$date = Get-Date;

$string = "the output was " + $var + " on " + $date;

$string | Out-File -FilePath C:\Users\me\Desktop\bitlocker.txt

When ran directly via PowerShell, the following is logged which is correct

the output was 1 on 09/08/2022 16:33:49

However when ran from a service made to invoke the PowerShell script, it gives the an incorrect result

the output was 0 on 09/08/2022 16:35:22