provisioner "file" don't work anymore als expected

[WardVissers]

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Overview of the Issue

provisioner "file" {
source = "./setup/Files_Win"
destination = "C:/Temp"
}

Probleem is with 15.1 Is should copy the all the files in ./setup/Files_Win to C:\temp not the whole folder Files_Win to temp outpout is c:\temp\Files_Win

Packer version

From packer version
15.1