ContactFieldControl not identified during transformation

I'm doing transformation from SharePoint 2013 towards SPO of a page that holds ContactFieldControl webparts.
The transformation logs below mentions the error that it does not recognize the Contact details webpart as a ContactFieldControl (Title is Department Manager). If I export the dwp file from the page it holds the correct TypeName and assembly for the v2 webpart

Microsoft.SharePoint.Portal, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c
Microsoft.SharePoint.Portal.WebControls.ContactFieldControl

I dont see a reason why it wouldnt work. The transformation is succesfull besides the warnings about these contact webparts. Other webparts like listview and CEWP are correctly transformed.

30/08/2021 13:38:25 | Input Validation | Validation checks complete
30/08/2021 13:38:25 | SharePoint Connection | Loading client context objects
30/08/2021 13:38:25 | SharePoint Connection | Loading target client context object
30/08/2021 13:38:25 | Page Creation | Detect if the page is living inside a folder
30/08/2021 13:38:25 | Page Creation | In Cross-Site transform mode the original source file name is used
30/08/2021 13:38:25 | Page Creation | Just try to load the page in the fastest possible manner, we only want to see if the page exists or not
30/08/2021 13:38:27 | Page Creation | The page already exists in target location
30/08/2021 13:38:27 | Page Creation | Modern page created
30/08/2021 13:38:27 | Article page handling | Transforming source page as Article page
30/08/2021 13:38:27 | Article page handling | Recognized source page as a Publishing Page - Analyzing web parts and page layouts
30/08/2021 13:38:27 | Page Layout Manager | Page uses ASMLDWExtendedPageLayoutMenu as page layout, mapping that will be used is ASMLDWExtendedPageLayoutMenu
30/08/2021 13:38:27 | URL rewriter | Loading URL mapping file C:\AzureDevOps\myASML2.0\myASML2-Migration\ToModernSPO\Source Files\urlmapping_EDEV01.csv
30/08/2021 13:38:28 | Content Transform | Calling Web Services to Extract Web Parts from Page
30/08/2021 13:38:31 | Content Transform | Source page contains web part Welcome to the Electronics Development DUV Homepage of type Microsoft.SharePoint.WebPartPages.ContentEditorWebPart
30/08/2021 13:38:31 | Content Transform | Source page contains web part Content Editor of type Microsoft.SharePoint.WebPartPages.ContentEditorWebPart
30/08/2021 13:38:31 | Content Transform | Source page contains web part News of type Microsoft.SharePoint.WebPartPages.ClientWebPart
30/08/2021 13:38:31 | Content Transform | Not Supported, Non Exportable or Unidentified Web Part
30/08/2021 13:38:31 | Content Transform | Source page contains web part Department Manager of type Unsupported Web Part Type
30/08/2021 13:38:31 | Content Transform | Not Supported, Non Exportable or Unidentified Web Part
30/08/2021 13:38:31 | Content Transform | Source page contains web part Management Assistant of type Unsupported Web Part Type

@jansenbe