Get-VM some VMs missing properties

Hi!
I'm getting some issues when I do a Get-VM against my vCenter. When I try to only see the property "VMHost", some of them have this propery, some others have it empty. This is doing a

Get-VM | Select VMHost

Same happens when querying for the sub property .Guest.OSFullName.

I'm using vCenter 6.7 and PowerCLI 6.5. Curiosly, this happens only for the VMs that are running Windows Server 2016. All the rest seems OK. For instance:

PowerCLI C:\> $VMs = Get-VM

PowerCLI C:\> $VMs | Select {$_.Guest.OSFullName}

Will return only the Linux ones, and the Windows Servers 2008 and 2012. All the ones that are 2016 are blank.

I've tried uninstalling PowerCLI and reinstalling it back. No luck. all the machines with 2016 are running VMTools latest version (as per vCenter).

Any help would be greatly appreciated.

Thanks!