PSUseOutputTypeCorrectly complains "... type is not declared in the OutputType attribute" even though it is

Steps to reproduce

PSScriptAnalyzer is complaining about a missing OutputType attribute, even though I did set it correctly.
See PSScriptAnalyzer CI comment under my commits: https://github.com/jantari/LSUClient/commit/a6c2fcc1622aa221d0be73debb4a97baea7b36b5

Easiest way to reproduce is test with my exact file:

mkdir test-pssa
curl.exe "https://raw.githubusercontent.com/jantari/LSUClient/develop/public/Install-LSUpdate.ps1" -o .\test-pssa\Install-LSUpdate.ps1
Import-Module PSScriptAnalyzer -RequiredVersion 1.20.0 # Latest
Invoke-ScriptAnalyzer -Path .\test-pssa -ExcludeRule PSAvoidTrailingWhitespace -Recurse -Verbose

Expected behavior

PSScriptAnalyzer should have no complaints.

Actual behavior

RuleName                            Severity     ScriptName Line  Message
--------                            --------     ---------- ----  -------
PSUseOutputTypeCorrectly            Information  Install-LS 93    The cmdlet 'Install-LSUpdate' returns an object of type
                                                 Update.ps1       'PackageInstallResult' but this type is not declared in the
                                                                  OutputType attribute.
PSUseOutputTypeCorrectly            Information  Install-LS 125   The cmdlet 'Install-LSUpdate' returns an object of type
                                                 Update.ps1       'PackageInstallResult' but this type is not declared in the
                                                                  OutputType attribute.

Environment data

Issue is reproducible under both:

> $PSVersionTable
Name                           Value
----                           -----
PSVersion                      7.2.1
PSEdition                      Core
GitCommitId                    7.2.1
OS                             Microsoft Windows 10.0.22538
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

> (Get-Module -ListAvailable PSScriptAnalyzer).Version | ForEach-Object { $_.ToString() }
1.20.0
1.19.1

and:

> $PSVersionTable
Name                           Value
----                           -----
PSVersion                      5.1.22538.1000
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.22538.1000
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

> (Get-Module -ListAvailable PSScriptAnalyzer).Version | ForEach-Object { $_.ToString() }
1.19.0
1.20.0
1.19.1

Beginnen Sie damit, den Bericht mit Install-LSUpdate.ps1 aus der verknüpften Reproduktion und Invoke-ScriptAnalyzer unter Verwendung von PSScriptAnalyzer 1.20.0 nachzustellen. Untersuchen Sie die Regel PSUseOutputTypeCorrectly und vergleichen Sie deren abgeleiteten PackageInstallResult-Ausgabetyp mit dem deklarierten OutputType. Als abgeschlossen gilt die Untersuchung, wenn die Fehlalarme bei den Diagnosen in den Zeilen 93 und 125 nicht mehr erscheinen, während weiterhin gültige Warnungen erkannt werden.