Looking in /Users/(user)/Library/Logs/VMware Fusion/ovftool.log it seems that ovftool is throwing a warning citing the undocumented parameter disk.PTReadOverride. An example is below (emphasis added):
2018-08-21T19:14:34.088-05:00| VMware Fusion| I125+ '--machineOutput' '--X:logFile=/Users/(user)/Library/Logs/VMware Fusion/ovftool.log' '--X:logLevel=verbose' --I:targetSessionTicket... '--I:morefArgs' '--noImageFiles' '--targetSSLThumbprint=(thumbprint)' '--name=(vm name)' '--datastore=vim.Datastore:datastore-47' '--vmFolder=vim.Folder:group-v184' '--net:nat=vim.Network:network-16' '--allowExtraConfig' '--extraConfig:disk.PTReadOverride=TRUE' '/Users/(user)/Documents/Virtual Machines/(vm name).vmwarevm/(vm name).vmx' 'vi://(vCenter FQDN)?moref=vim.HostSystem:host-23'
2018-08-21T19:14:35.630-05:00| VMware Fusion| I125: OVFTool::OnExit
2018-08-21T19:14:35.639-05:00| VMware Fusion| I125: OVFTool::HandleWarnings: Warning type 'ovftool-warning.transform.extraconfig.not.allowed', message 'ExtraConfig option 'disk.PTReadOverride' is not allowed, will skip it.'
Unfortunately I have no information on what disk.PTReadOverride refers to, other than that it appears in lamw's 2010 list of undocumented .vmx parameters (see https://www.virtuallyghetto.com/2010/10/1200-undocumented-vmx-parameters.html for the blog and https://s3.amazonaws.com/virtuallyghetto-download/hidden_vmx_params.html for the list.