Import-SPWeb does not include 'People'

Hello,

I have exported a list which has two 'People' columns in using Export-SPWeb PS.  When I try and restore the same list back to the same site all of the data is there but the 'People' columns are not populated....

I exported the list using Central Admin - granular backup and imported using PS.

Has anyone else seen this?  If so is this the expected behaviour?

Thanks,

Adam