Bundle "Run as administrator" -- open readme file from .ba folder / Payload

[ManuHArt]

WiX version used: 4.0.5

I have a bundle with a custom managed bootstrapper using .NET 4.8, written in C#. This bootstrapper has as <Palyoad> a readme file (as PDF). Inside the bootstrapper, I have a button that opens the readme with the user's default application:

var process = new Process
 {
     StartInfo = {FileName = Path.Combine(Path.GetDirectoryName(GetType().Assembly.Location), this.eula)}
 };

 process.Start();

The default program for PDF in Windows 10 / Windows 11 is Edge.

In WiX 3, I can open the file regardless if a user runs the bundle via double-clicking or using "Run as administrator".

In WiX 4, this only works for the first case. If I use "Run as administrator", Edge displays "File not fund" since it can't access the file in the .ba directory.

Directory access rights in WiX 3:
Normal launch:

C:\Users\UserA\AppData\Local\Temp\{4B30C15D-14FB-43A8-B004-5AA05D849088} NT AUTHORITY\SYSTEM:(OI)(CI)(F)
                                                                         BUILTIN\Administrators:(OI)(CI)(F)
                                                                         WIN-M8C3CFJ6JMO\UserA:(OI)(CI)(F)

Launch via "Run as administrator":

C:\Windows\Temp\{B4F90A9D-9357-409C-A267-676DDB17F1AF} BUILTIN\Users:(I)(CI)(S,WD,AD,X)
                                                       BUILTIN\Administrators:(I)(OI)(CI)(F)
                                                       NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F)
                                                       CREATOR OWNER:(I)(OI)(CI)(IO)(F)
                                                       WIN-M8C3CFJ6JMO\UserA:(I)(OI)(CI)(F)

Directory access rights in WiX 4:
Normal launch:

C:\Users\UserA\AppData\Local\Temp\{66D45AF9-47EE-4CE1-B4B9-FF70855D45B3} NT AUTHORITY\SYSTEM:(OI)(CI)(F)
                                                                         BUILTIN\Administrators:(OI)(CI)(F)
                                                                         WIN-M8C3CFJ6JMO\UserA:(OI)(CI)(F)

Launch via "Run as administrator":

C:\Windows\Temp\{35E2BD42-3718-4B16-8AB3-31F377A96AE9} BUILTIN\Administrators:(F)
                                                       BUILTIN\Administrators:(OI)(CI)(IO)(F)
                                                       NT AUTHORITY\SYSTEM:(F)
                                                       NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F)

System info:
Windows 10 Pro 20H2
Windows 11 Pro 22H2
Windows Server 2016 (non-AD)
Windows Server 2022 (non-AD)

I guess this change was intentional and due to security reasons?

How can I now open my readme file in the "Run as administrator" case?

[ManuHArt]

Any updates on this?

I added the tested Windows versions.

[ManuHArt]

This worked in WiX 4.0.4, so it looks like it has the same origin as https://github.com/orgs/wixtoolset/discussions/8154