scvmm 2012 custom properties broken

I'm having this issue and wondering if it's a BUG:

Using powershell on the VMM 2012 server, Legacy custom properties (Custom1-Custom10) cannot be updated. Try this and see:

get-vm | select name,{$_.customproperties[9]}
get-vm | Set-VM -custom10 "TEST10"  | Select Name
get-vm | select name,{$_.customproperties[9]}

What I find is that custom9 hasnt changed for all VMs. sometimes it changes for none of them... :(

I can set other fields (like -TAG) just fine...

yes I'm admin and running elevated powershell.

I'd appreciate it if someone can verify these symptoms on their systems.

cheers,

-MCT