SharePoint Migration Tool - Full Control permission not preserved

Hi,

I'm using SPMT version 3.2.118.0 and I'm trying to migrate a folder of a file share to the root folder a doclib of a SPO site while preserving permissions. Groups or users with Read and Write permissions are well migrated with these permissions preserved (read--read, write-->contribute) but groups or users with "full control" permissions are not migrated at all! And SPMT reports it has successfully migrated the content!

Example:

If my local share is C:\TestDocs with

-user1 having full control,

-group1 Read perm,

-group2 Write perm and

-group3 Full control   

The target /TestDocs document library of the SPO site will have indeed unique permissions but with:

-group1 Read perm,

-group2 Contribute perm 

user1 and group3 which were supposed to have Full control are lost!

I checked the reports and logs but cannot find any information.

Any idea?

Thanks

Franck