LibMan runs before dependent project targets

[AlexanderRydberg]

Problem
ProjectB generates files in a Target

<Target Name="RunLBeforeBuildStepgen" BeforeTargets="BeforeBuild" >
	<Message Text="=== Generating localizations ===" Importance="high" />
       <WriteLinesToFile File="Localizations.js" Lines="Localization data generated before build." />
</Target>

ProjectA have this in its libman.json

{
  "version": "1.0",
  "defaultProvider": "filesystem",
  "libraries": [
    {
      "library": "../../ProjectB/",
        "files": [ "Localizations.js" ],
      "destination": "wwwroot/assets/l10n/"
    }
  ]
}

dotnet build .\ProjectA\ProjectA\ProjectA.csproj fails:

Restore complete (0.3s)
    info NETSDK1057: You are using a preview version of .NET. See: https://aka.ms/dotnet-support-policy
  ProjectA net8.0 failed with 2 error(s) (0.1s)
    D:\Nuget\microsoft.web.librarymanager.build\3.0.71\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error
      System.AggregateException: One or more errors occurred. (The "../../ProjectB/" library could not be resolved by th
      e "filesystem" provider)
       ---> Microsoft.Web.LibraryManager.Contracts.InvalidLibraryException: The "../../ProjectB/" library could not be r
      esolved by the "filesystem" provider
         at Microsoft.Web.LibraryManager.Providers.FileSystem.FileSystemProvider.GetStreamAsync(ILibraryInstallationStat
      e state, String file, CancellationToken cancellationToken)
         --- End of inner exception stack trace ---
         at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
         at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
         at Microsoft.Web.LibraryManager.Providers.FileSystem.FileSystemProvider.<>c__DisplayClass9_1.<InstallAsync>b__0
      ()
         at Microsoft.Web.LibraryManager.Build.Contracts.HostInteraction.WriteFileAsync(String path, Func`1 content, ILi
      braryInstallationState state, CancellationToken cancellationToken)
         at Microsoft.Web.LibraryManager.Providers.FileSystem.FileSystemProvider.InstallAsync(ILibraryInstallationState
      desiredState, CancellationToken cancellationToken)
    libman.json : error LIB000: An unknown exception occurred

#642 describes a similar problem. But in my case its a target in a referenced project. And yes, also tried BeforeTargets="LibraryManagerRestore"

Created a little repo https://github.com/AlexanderRydberg/LibraryManagerTargetIssue

Expected behavior
Targets in referenced project being run before libman.

Is this behavior by design?
Any suggestions on how I could solve this without:
manually building ProjectB first and then ProjectA
or
Copy Target from ProjectB to ProjectA's csproj and have BeforeTargets="LibraryManagerRestore"