Invoke-PnPSiteTemplate throw error: "Index was outside the bounds of the array" with DefaultColumnValue on Folder in template

When provisioning a list whit folder and applying a DefaultColumnValue, in this case on a Choice column the provisioning fails with the error "Index was outside the bounds of the array".

                               <pnp:DefaultColumnValues>
                                 <pnp:DefaultColumnValue Key="DocumentType" Value="a Contract" />
                               </pnp:DefaultColumnValues>
               <pnp:Properties>
                 <pnp:Property Key="Title" Value="" />
               </pnp:Properties>
             </pnp:Folder>```

Invoke-PnpsiteTemplate -Path ./30-lists-Contract-Excluding-Financial-Details.xml
Error: Invoke-PnPSiteTemplate: Index was outside the bounds of the array.
Message          : Index was outside the bounds of the array.
Stacktrace       :    at PnP.PowerShell.Commands.Base.PnPConnectedCmdlet.ProcessRecord() in
                  c:\build\src\Commands\Base\PnPConnectedCmdlet.cs:line 101
                     at System.Management.Automation.CommandProcessor.ProcessRecord()
ScriptLineNumber : 1

Reproduce the failure with Invoke-PnPSiteTemplate using 30-lists-Contract-Excluding-Financial-Details.xml and the shown Folder DefaultColumnValue. Start at PnPConnectedCmdlet.cs:101 and trace the provisioning-engine handling of the folder and choice column. Done means the template provisions successfully without the array-bounds error.