Editing a host and trying to update f.ex. cpu/memory on the Virtual Machine tab yields an error message if the vm in vmware has a snapshot taken.

Error message:

Unable to save
Failed to update a compute VMware (VMware) instance lxserv940.smhi.se: InvalidRequest: Unexpected element tag "deltaDiskFormatVariant" seen while parsing
serialized DataObject of type vim.vm.device.VirtualDisk.FlatVer2BackingInfo at line 1, column 632 while parsing property "backing" of static type 
VirtualDeviceBackingInfo while parsing serialized DataObject of type vim.vm.device.VirtualDisk at line 1, column 480 while parsing property "device" of static type 
VirtualDevice while parsing serialized DataObject of type vim.vm.device.VirtualDeviceSpec at line 1, column 404 while parsing property "deviceChange" of static
 type ArrayOfVirtualDeviceConfigSpec while parsing serialized DataObject of type vim.vm.ConfigSpec at line 1, column 255 while parsing call information for method
 ReconfigVM_Task at line 1, column 177 while parsing SOAP body at line 1, column 167 while parsing SOAP envelope at line 1, column 0 while parsing HTTP request for
 method reconfigure on object of type vim.VirtualMachine at line 1, column 0

This is on vSphere 6.7